Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh van » thanh san, thanh toan, thanh nhan
tu sach » thu sach, su sach, te sach
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

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) or (hoc sinh)) ky tang ma hoi. hieu va cam duc va ((thanh van) OR (thanh phan)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sinh)) ky tang ma hoi. hieu va cam duc va ((thanh van) OR (thanh phan)) cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc sinh)) ky tang ma hoi. hieu va cam duc va ((thanh van) OR (thanh phan)) cua vat".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sinh)) ky tang ma hoi. hieu va cam duc va ((thanh van) OR (thanh phan)) cua vat*.