Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cuu tre, cua triet, dua tren
tu sac » tu sach, tu san, tu bac
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) OR (tu cac)) ky tang xa hoi. hieu ve cam duc van hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky tang xa hoi. hieu ve cam duc van hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu cac)) ky tang xa hoi. hieu ve cam duc van hanh vi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu cac)) ky tang xa hoi. hieu ve cam duc van hanh vi ((cua tre) or (cua te))*.