Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
va nang » van nang, da nang, cam nang
va hang » van hang, va lang, va hanh
sach ky » sac ky, sach ty, sach kem
cac thu » cach thuc, cac thoi
cua tre » cua te, cuu tre, cua triet
cao hoa » cao hoat, cao khoa, cau hoa
di cua » dai cua, doi cua, de 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) OR (sach y)) nang cao hoa. hieu viec cac thu ((va hang) or (va nang)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang cao hoa. hieu viec cac thu ((va hang) OR (va nang)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) nang cao hoa. hieu viec cac thu ((va hang) or (va nang)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) nang cao hoa. hieu viec cac thu ((va hang) or (va nang)) di cua tre*.