Perhaps you should try some spelling variations:
su triet » su viet, ve triet
danh sai » dung sai, danh bat, danh dau
pham duy » pham duc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
su tien » su kien, su hien, tu tieng
va danh » va dinh, va dan, va hanh
va pham » van pham, va phat, va phap
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
duy va » duy vat, duy van, day va
cua cu » cua chu, cua cau, cua su

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 lang xa hoi. hieu va pham duy va danh sai ((((su triet) or (su tien))) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va pham duy va danh sai ((((su triet) OR (su tien))) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va pham duy va danh sai ((((su triet) or (su tien))) or (cua cu))*.