Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
cao hoa » cao hoat, cao khoa, cau hoa
cac thu » cach thuc, cac thoi
va nang » van nang, da nang, cam nang
nang vi » hang vi, nang ji, nang si
thu va » thuc va, thue va, tu va
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: su sach ky nang cao hoa. ((hieu viec) or (nhieu viec)) cac thu va nang vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang cao hoa. ((hieu viec) OR (nhieu viec)) cac thu va nang vi cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang cao hoa. ((hieu viec) or (nhieu viec)) cac thu va nang vi cua triet*.