Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
dang xay » dang van, van xay
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
ve nham » ve nha, ve cham
xay hoi » xa hoi, tay hoi, cay phoi
sac ky » cac ky
ve va » ve van, te va, le va
ke va » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sac ky) or (sai ky)) dang xay hoi. hieu ve nham thuc va hanh ((ve va) or (ke va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sac ky) OR (sai ky)) dang xay hoi. hieu ve nham thuc va hanh ((ve va) OR (ke va)) trien.
• Adding a wildcard symbol may retrieve word variants: te ((sac ky) or (sai ky)) dang xay hoi. hieu ve nham thuc va hanh ((ve va) or (ke va)) trien*.