Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec lam » viec va
lam thuc » lam thuoc, am thuc, nam thuc
hang doi » hang di, hang loi, huong doi
dan hang » ban hang, van hang, dat hang
lang van » dang van, tang van, hoang van
thuc dan » thuc hanh, hoc dan, thuc vat
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
van hoc » van hoa
ky lang » ky nang, ky dang, ky tang
tu san » thu san, tu ban, tu can
tu sac » tu sach, tu cac, tu bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu san)) ky lang van hoc. hieu viec lam thuc dan hang doi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky lang van hoc. hieu viec lam thuc dan hang doi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu san)) ky lang van hoc. hieu viec lam thuc dan hang doi ((cua tre) or (cuu tre))*.