Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
vai cua » dai cua, hai cua, lai cua
cam luc » cam xuc, cau luc
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky sang ma hoi. ((hieu ve) or (lieu va)) cam luc ((va thanh) OR (gia thanh)) vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky sang ma hoi. ((hieu ve) OR (lieu va)) cam luc ((va thanh) OR (gia thanh)) vai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky sang ma hoi. ((hieu ve) or (lieu va)) cam luc ((va thanh) OR (gia thanh)) vai cua vat".
• Adding a wildcard symbol may retrieve word variants: tu sai ky sang ma hoi. ((hieu ve) or (lieu va)) cam luc ((va thanh) OR (gia thanh)) vai cua vat*.