Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
chua tre » chua tri, cua tre, chua trieu
viec cac » vien cac, viec cua, viec lam
nang ma » tang ma, sang ma, nang cao
sach lo » sach dao, sach doi, sach hoi
cac tac » cac toc, cac bac, cac dac
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang
va chua » vua chua, ca chua, va chu
tu sach » thu sach, su sach, te sach

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 lo ((nang ma) or (mang may)) hoa. hieu viec cac tac ((va hang) OR (va nang)) va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach lo ((nang ma) OR (mang may)) hoa. hieu viec cac tac ((va hang) OR (va nang)) va chua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach lo ((nang ma) or (mang may)) hoa. hieu viec cac tac ((va hang) OR (va nang)) va chua tre*".