Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
sang mai » sang ma, sang tai, lang mai
tu sach » thu sach, te sach, tu cach
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
su sach » so sach, vu sach
vai cua » dai cua, hai cua, lai cua
luc va » duc va, tuc va, loc 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) OR (su sach)) ky sang mai hoi. ((hieu ve) or (hieu va)) cam luc va thanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky sang mai hoi. ((hieu ve) OR (hieu va)) cam luc va thanh vai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky sang mai hoi. ((hieu ve) or (hieu va)) cam luc va thanh vai cua vat".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky sang mai hoi. ((hieu ve) or (hieu va)) cam luc va thanh vai cua vat*.