Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
sanh thai » sinh thai, nhanh thai, tranh thai
thai thuc » thai thuy, thai tuc, tham thuc
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khau » khoa kham, khoa phau, khoa chau
anh thai » anh thi, anh tai, nhanh thai
so sanh » do sanh
so anh » so danh, do anh, ho anh

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 thai thuc hanh khoa khau thong ) or ( so anh thai thuc hanh khoa khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sanh thai thuc hanh khoa khau thong ) OR ( so anh thai thuc hanh khoa khau thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sanh thai thuc hanh khoa khau thong ) or ( so anh thai thuc hanh khoa khau thong ))*.