Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa khau » khoa kham, khoa phau, khoa chau
sanh dai » sinh dai, sanh dan, vanh dai
thu hanh » thuc hanh, thu thanh, thuy hanh
so sanh » do sanh
dai thu » dai thua, dai thuc, doi thu
anh dai » vanh dai, anh bai, anh dat
do anh » do sanh, do danh

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