Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh vi » hanh vi, dinh vi, danh di
qua cao » qua cac, qua ca, qua cai
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
sac ky » cac ky, sai ky
luc va » duc va, tuc va
loc va » hoc va
su sac » su sach, su cac, su xac
vi su » va su, ve su, ki su

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

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