Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach lo » sach dao, sach doi, sach hoi
lo lang » o lang, so lang, le lang
ban duc » ban duoc, van duc, ban dac
va hanh » van hanh, va thanh, va danh
vai va » mai va, dai va, hai va
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach lo lang ((van loi) or (van hoa)). hieu van ban duc va hanh vai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach lo lang ((van loi) OR (van hoa)). hieu van ban duc va hanh vai va thiet.
• Adding a wildcard symbol may retrieve word variants: su sach lo lang ((van loi) or (van hoa)). hieu van ban duc va hanh vai va thiet*.