Perhaps you should try some spelling variations:
ban thai » ban than, ban thi, ban tai
pham duy » pham duc
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
duy va » duy vat, duy van, day va
va ban » van ban, va bai, va bao
tu san » thu san, tu ban, tu can
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ve cac) or (tu san)) ky tang xa hoi. hieu va pham duy va ban thai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ve cac) OR (tu san)) ky tang xa hoi. hieu va pham duy va ban thai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ve cac) or (tu san)) ky tang xa hoi. hieu va pham duy va ban thai ((cua tre) OR (cuu tre))*".