Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
tay lang » tai lang, tay tang, tay quang
va thanh » gia thanh, va tinh, le thanh
cau luc » cau truc, cau phuc
su sach » so sach, vu sach
ty lang » ty xang, ty hang, tu lang
qua cau » quan cau, qua cac, qua ca
va va » va van, va vua, va vai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty lang) OR (tay lang)) xa hoi. hieu qua cau luc ((va thanh) OR (ban thanh)) va va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty lang) or (tay lang)) xa hoi. hieu qua cau luc ((va thanh) OR (ban thanh)) va va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty lang) or (tay lang)) xa hoi. hieu qua cau luc ((va thanh) OR (ban thanh)) va va triet*.