Perhaps you should try some spelling variations:
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
van hoe » van hoa, van hoc, van hieu
van bao » van dao
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 hoe)). hieu ((van bao) OR (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 hoe)). hieu ((van bao) OR (van ban)) duc va hanh vai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach lo lang ((van loi) or (van hoe)). hieu ((van bao) OR (van ban)) duc va hanh vai va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach lo lang ((van loi) or (van hoe)). hieu ((van bao) OR (van ban)) duc va hanh vai va thiet*.