Perhaps you should try some spelling variations:
ban thai » ban than, ban thi, ban tai
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
ve chim » va chim, ve cham, ve chinh
vu cham » va cham, vu kham, tu cham
duc van » duc va, duc tan, duc manh
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 chim) or (vu cham)) duc van ban thai ((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 chim) OR (vu cham)) duc van ban thai ((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 chim) or (vu cham)) duc van ban thai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su cac ky tang xa hoi. hieu ((ve chim) or (vu cham)) duc van ban thai ((cua tre) OR (cua te))*.