Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
cau loc » hau loc, cau hoc, cau luc
qua cau » quan cau, qua cac, qua ca
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
loc va » hoc va, luc va
vai va » mai va, dai va, hai va

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 ky) OR (sach y)) ((tang xa) OR (lang xa)) hoi. hieu qua cau loc va hanh vai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sach y)) ((tang xa) or (lang xa)) hoi. hieu qua cau loc va hanh vai va triet~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) OR (sach y)) ((tang xa) or (lang xa)) hoi. hieu qua cau loc va hanh vai va triet*.