Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
va bao » va bai
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang ((ma hoi) or (xa hoi)). hieu ((va cac) or (va bao)) xuc va hanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang ((ma hoi) OR (xa hoi)). hieu ((va cac) OR (va bao)) xuc va hanh dai cua vat.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((ma hoi) or (xa hoi)). hieu ((va cac) or (va bao)) xuc va hanh dai cua vat*.