Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
thanh vi » hanh vi, thanh va, thanh ve
luy tre » luyen tre
hieu ve » hieu va, hieu van
luu tre » luu tru, cuu tre
thuc va » thuc vat, thuc dan, thuc day
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac

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 nang cau hoi. hieu ve cac ((duc va) or (thuc va)) thanh vi ((luu tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang cau hoi. hieu ve cac ((duc va) OR (thuc va)) thanh vi ((luu tre) OR (luy tre)).
• Adding a wildcard symbol may retrieve word variants: te sac ky nang cau hoi. hieu ve cac ((duc va) or (thuc va)) thanh vi ((luu tre) or (luy tre))*.