Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
sanh thi » anh thi, oanh thi, nhanh thi
thi hang » thi hanh, thi nang, thi hong
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
xa thanh » va thanh, ha thanh, ta thanh
so sanh » do sanh
hang xa » hoang xa, hang va, hang ca
xa hanh » xa khanh, va hanh, da hanh
tai cua » thai cua, tri cua, dai cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh thi hang xa hoi. hieu van tham thuc ((xa hanh) or (xa thanh)) ((tai cua) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh thi hang xa hoi. hieu van tham thuc ((xa hanh) OR (xa thanh)) ((tai cua) OR (tai cuc)) tre.
• Adding a wildcard symbol may retrieve word variants: so sanh thi hang xa hoi. hieu van tham thuc ((xa hanh) or (xa thanh)) ((tai cua) or (tai cuc)) tre*.