Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
ca tren » cau tren, cu tren, la tren
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
cam luc » cau luc
va tinh » may tinh
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
ve ca » ve cac, ve cai, ve cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san ky tang xa hoi. hieu qua ((cam luc) or (cam xuc)) ((ban thanh) or (va tinh)) ve ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky tang xa hoi. hieu qua ((cam luc) OR (cam xuc)) ((ban thanh) OR (va tinh)) ve ca tren.
• Adding a wildcard symbol may retrieve word variants: te san ky tang xa hoi. hieu qua ((cam luc) or (cam xuc)) ((ban thanh) or (va tinh)) ve ca tren*.