Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cau » quan cau, qua cac, qua ca
cau loc » hau loc, cau hoc, cau luc
loc va » hoc va, luc va
dan vi » doan vi, don vi, gan vi
dan va » doan va, dan ca, ban va

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

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