Perhaps you should try some spelling variations:
cham hoi » cham voi, cham h'roi, pham hoai
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
hieu vu » hieu ve, hieu su, dieu vu
minh ve » dinh ve, minh va, kinh ve
hoi van » hoi va, hoi dan, hai van
cua tu » cua tuc, cua cu, cua te
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

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 ma hoi. ((hieu vu) OR (hieu va)) cham hoi van minh ve ((cua tu) OR (cua su))~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. ((hieu vu) or (hieu va)) cham hoi van minh ve ((cua tu) or (cua su))*.