Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
hieu viec » nhieu viec, hieu ve, sieu viet
toc sach » hoc sach, doc sach, thuoc sach
viec dat » vien dai, vien da, viec lam
hoc viet » hoc hien
dong ma » duong ma, dong mua, dong ha
dang ma » dang mau, dang mam, dang mat
dat xuc » dat nuoc, dat duoc, chat xuc
va hanh » van hanh, va thanh, va danh
va dinh » van dinh, va kinh, va tinh
va hoc » van hoc

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 thue ((dang ma) or (dong ma)) hoi. hieu viec dat xuc ((va hanh) or (va dinh)) va hoc viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thue ((dang ma) OR (dong ma)) hoi. hieu viec dat xuc ((va hanh) OR (va dinh)) va hoc viet.
• Adding a wildcard symbol may retrieve word variants: toc sach thue ((dang ma) or (dong ma)) hoi. hieu viec dat xuc ((va hanh) or (va dinh)) va hoc viet*.