Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
viec va » vien va, viec cua, viec lam
toc gia » toc giay, tac gia, quoc gia
cua tre » cua te, cuu tre, cua triet
y sang » _ sang, duy sang
ma hoi » mai hoi, xa hoi, me hoi
va toc » va doc, va tac, va tuc
va cua » va chua, via cua, ca 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 y sang ((ma hoi) or (ma hoa)). hieu viec va toc gia thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y sang ((ma hoi) OR (ma hoa)). hieu viec va toc gia thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y sang ((ma hoi) or (ma hoa)). hieu viec va toc gia thanh va cua tre*.