Perhaps you should try some spelling variations:
dat thanh » dao thanh, dat khanh, dang thanh
thanh va » thanh van, hanh va, thanh ha
nam thuc » nam thuoc, am thuc, nam thu
thuc dat » thuc vat, thuc dan, thuc day
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hieu ve » hieu va, hieu van
vu san » va san, vu ban
cua tu » cua tuc, cua cu, cua te
ve nam » he nam, va nam, le nam
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu san ((ky lang) OR (ky tang)) xa hoi. hieu ve nam thuc dat thanh va ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu san ((ky lang) OR (ky tang)) xa hoi. hieu ve nam thuc dat thanh va ((cua tu) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu san ((ky lang) OR (ky tang)) xa hoi. hieu ve nam thuc dat thanh va ((cua tu) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: vu san ((ky lang) OR (ky tang)) xa hoi. hieu ve nam thuc dat thanh va ((cua tu) or (cua su))*.