Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
kho tang » cao tang
chat xuc » chat huu, cam xuc, chao xu
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
tu san » thu san, tu ban, tu can
tu sai » tu bai, tu cai, tu lai

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) OR (tu san)) kho tang ma hoi. hieu va chat xuc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu san)) kho tang ma hoi. hieu va chat xuc van hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu san)) kho tang ma hoi. hieu va chat xuc van hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu san)) kho tang ma hoi. hieu va chat xuc van hanh vi ((cua tre) or (cuu tre))*.