Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
toc sach » hoc sach, doc sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
thu bang » thu ban, thu hang, chu bang
bang ma » bang may, tang ma, ban ma
viec da » viec dat, vien da, viec va
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
ma hoi » mai hoi, xa hoi, ma hoa
o viet » so viet, hoc viet
va o » va co, va do, va mo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thu bang ma hoi. hieu viec da xuc ((va hanh) or (va danh)) va o viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu bang ma hoi. hieu viec da xuc ((va hanh) OR (va danh)) va o viet.
• Adding a wildcard symbol may retrieve word variants: toc sach thu bang ma hoi. hieu viec da xuc ((va hanh) or (va danh)) va o viet*.