Perhaps you should try some spelling variations:
sach tham » sach nha
hieu viec » nhieu viec, hieu ve, sieu viet
toc sach » hoc sach, doc sach, thuoc sach
dang mat » dang vat, dang mau, dung mat
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
viec da » viec dat, vien da, viec va
dong ma » duong ma, dong mua, dong ha
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 tham ((dang mat) or (dong ma)) hoi. hieu viec da xuc ((va hanh) or (va dinh)) va o viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tham ((dang mat) OR (dong ma)) hoi. hieu viec da xuc ((va hanh) OR (va dinh)) va o viet.
• Adding a wildcard symbol may retrieve word variants: toc sach tham ((dang mat) or (dong ma)) hoi. hieu viec da xuc ((va hanh) or (va dinh)) va o viet*.