Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cau tren » cu tren, dau tren, ca tren
thanh va » thanh van, hanh va, thanh ha
cuu tre » cua tre, cau treo
toc gia » toc giay, tac gia, quoc gia
tu sach » thu sach, su sach, te sach
viec va » vien va, viec cua, viec lam
y sang » _ sang, duy sang
va toc » va doc, va tac, va tuc
ma hoi » mai hoi, xa hoi, me hoi

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 ((cuu tre) OR (cau tren))~.
• 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 ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y sang ((ma hoi) or (ma hoa)). hieu viec va toc gia thanh va ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach y sang ((ma hoi) or (ma hoa)). hieu viec va toc gia thanh va ((cuu tre) OR (cau tren))*.