Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
thu sach » tu sach, thuat sach, thuoc sach
may hoi » may thoi, tay hoi, mai hoi
va hanh » van hanh, va thanh, va danh
y mang » cay mang
cua du » cua duc, cua ndu, cua su
cua tu » cua tuc, cua su, cua cu
du va » dau va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y mang may hoi. hieu viec cua du va hanh vi ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y mang may hoi. hieu viec cua du va hanh vi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu sach y mang may hoi. hieu viec cua du va hanh vi ((cua te) OR (cua tu))*.