Perhaps you should try some spelling variations:
can thanh » ban thanh, van thanh, cac thanh
pham duy » pham duc
su triet » su viet, ve triet
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
duy can » duy van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
su tien » su kien, su hien, tu tieng

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. ((hieu ve) or (lieu va)) pham duy can thanh va ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. ((hieu ve) OR (lieu va)) pham duy can thanh va ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. ((hieu ve) or (lieu va)) pham duy can thanh va ((su triet) or (su tien))*.