Perhaps you should try some spelling variations:
nang co » nang cao, nang doc, nang noi
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
hai va » hai van, thai va, hoi va
co hoi » co hoc, co loi
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
thiet » thieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang co hoi. hieu ((ve cham) OR (vu cham)) tuc va hanh ((hai va) OR (mai va)) thiet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang co hoi. hieu ((ve cham) OR (vu cham)) tuc va hanh ((hai va) or (mai va)) thiet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang co hoi. hieu ((ve cham) OR (vu cham)) tuc va hanh ((hai va) or (mai va)) thiet*.