Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cua viet » ca viet, hoa viet, cua vat
chat xuc » chat huu, cam xuc, chao xu
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
nang ma » tang ma, sang ma, nang cao
sach tu » sach thu, cach tu, sach uu
sach ty » sach y, sach thu, xach tay
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach tu)) nang ma hoi. hieu viec ((cac nuoc) or (chat xuc)) va danh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang ma hoi. hieu viec ((cac nuoc) OR (chat xuc)) va danh vi cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) nang ma hoi. hieu viec ((cac nuoc) or (chat xuc)) va danh vi cua viet*.