Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh hai » thanh hai, nhanh hai, hang hai
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
qua cau » quan cau, qua cac, qua ca
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
hai va » hai van, thai va, hoi 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 ((tang xa) OR (tang ma)) hoi. hieu qua cau ((luc va) OR (tuc va)) hanh hai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((tang xa) or (tang ma)) hoi. hieu qua cau ((luc va) OR (tuc va)) hanh hai va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((tang xa) or (tang ma)) hoi. hieu qua cau ((luc va) OR (tuc va)) hanh hai va triet*.