Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
va nhanh » va thanh, va hanh, va nhan
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
hai chu » hai chau, hoi chu, hai chi
thuc va » thuc vat, thuc dan, thuc day
chu tre » cho tre, chu tri, cuu tre
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang ((ma hoi) or (ma hoa)). hieu van nam thuc va nhanh hai chu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang ((ma hoi) OR (ma hoa)). hieu van nam thuc va nhanh hai chu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang ((ma hoi) or (ma hoa)). hieu van nam thuc va nhanh hai chu tre*.