Full term match is one of the matching option supported by SearchIQ. It lets a user query matches your posts/products whenever “all terms” in the user query is found on the posts/products regardless the ordering. This option allows you to increase the coverage of your posts/products but still keep a high relevancy.
Broad match is the default matching option that SearchIQ uses. It lets a user query matches your posts/products whenever someone searches for that phrase, similar phrases, singular or plural forms, misspellings, synonyms, stemmings (such as floor and flooring), related searches, and other relevant variations. This option allows you to increase the coverage of your posts against user query but it also gives a chance for some not highly relevant posts and products to be shown. To migrate the irrelevancy issue, SearchIQ will rank the most relevant posts and products at the top of the result. Some of our users use this option along with field weight specified. This gives them better control the ranking of the matched posts/products.
Phrase match is one of the keyword matching options SearchIQ provided. It allows you to match user query in exact form from any of the fields indexed. For example, if user types “tennis shoes”, the posts/products contain “tennis shoes” with other terms before or after the phrase will be shown, but not for “shoes for tennis”, or “tennis sneakers”. Phrase match is more targeted than broad match and full term match.
However, if you feel this match option is too restricted. You can consider to use broad match and full term match. Both of these matching options support phrase match with quotes before and after the search query.
Cross Domain allows you to link your sites together and search across them. You can create group(s) among your sites and search within the group