Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
va thanh » gia thanh, va tinh, le thanh
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang x ho. hieu qua cac xuc ((va thanh) or (ban thanh)) sinh ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang x ho. hieu qua cac xuc ((va thanh) OR (ban thanh)) sinh ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky nang x ho. hieu qua cac xuc ((va thanh) or (ban thanh)) sinh ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang x ho. hieu qua cac xuc ((va thanh) or (ban thanh)) sinh ((cua tre) OR (cua triet))*.