Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
qua cac » cua cac
cac duc » cac du, cao duc, cac dac
dau sai » dau hai, dau tai, danh sai
cua tuc » cua duc, cua tu, cua thuoc
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky tang xa hoi. hieu qua cac duc va dau sai ((su triet) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang xa hoi. hieu qua cac duc va dau sai ((su triet) OR (cua tuc)).
• Adding a wildcard symbol may retrieve word variants: te sach ky tang xa hoi. hieu qua cac duc va dau sai ((su triet) or (cua tuc))*.