Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
kho tang » cao tang
ve phan » va phan, ke phan, ve phat
ky tang » ky nang, ky dang, ky trong
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
su can » su van, su cao, tu can
v pham » vi pham, d pham
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 can ((ky tang) OR (kho tang)) xa hoi. hieu ((v pham) or (ve phan)) duc ban thanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su can ((ky tang) OR (kho tang)) xa hoi. hieu ((v pham) OR (ve phan)) duc ban thanh hai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su can ((ky tang) OR (kho tang)) xa hoi. hieu ((v pham) or (ve phan)) duc ban thanh hai cua te".
• Adding a wildcard symbol may retrieve word variants: su can ((ky tang) OR (kho tang)) xa hoi. hieu ((v pham) or (ve phan)) duc ban thanh hai cua te*.