Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
hieu van » hieu va, thien van, lieu va
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va
cam duc » cam xuc, cao duc, pham duc
cua tre » cuu tre, cua triet, dua tren
su cac » tu cac, su cao, su can
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: su cac ky tang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan thanh san ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan thanh san ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky tang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan thanh san ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su cac ky tang xa hoi. ((hieu ve) OR (hieu van)) cam duc tan thanh san ((cua tre) or (cua te))*.