Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
va triet » va thiet, va trien, ve triet
nang ma » tang ma, sang ma, nang cao
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
lo van » le van, vo van, so van
loc va » hoc va, luc va
anh vi » hanh vi, anh va, anh ve

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

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