Perhaps you should try some spelling variations:
thuat sac » thuat sach, thuat san, thuat tac
nang ma » tang ma, sang ma, nang cao
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
va cham » va chat, va tham
loc va » hoc va, luc va
sac ky » cac ky, sai ky
va cam » va cac, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sac ky nang ma hoi. hieu ((va cam) or (va cham)) loc va ((danh vi) or (dinh vi)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sac ky nang ma hoi. hieu ((va cam) OR (va cham)) loc va ((danh vi) OR (dinh vi)) cua vat.
• Adding a wildcard symbol may retrieve word variants: thuat sac ky nang ma hoi. hieu ((va cam) or (va cham)) loc va ((danh vi) or (dinh vi)) cua vat*.