Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, nhanh vi
su triet » su viet, ve triet
thanh ve » hanh ve, thanh va, thanh vien
tu sach » thu sach, su sach, te sach
phan do » phan bo, phan co, phan mo
ky phan » ke phan, ly phan, ky phap
lang xa » lang ha, dang xay, lang van
su tien » su kien, su hien, tu tieng
y lang » o lang, _ lang, tay lang
do van » dao van, vo van, so van

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: tu sach y lang xa hoi. hieu ky phan do van ((thanh vi) OR (thanh ve)) ((su triet) OR (su tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y lang xa hoi. hieu ky phan do van ((thanh vi) or (thanh ve)) ((su triet) OR (su tien))~".
• Adding a wildcard symbol may retrieve word variants: tu sach y lang xa hoi. hieu ky phan do van ((thanh vi) or (thanh ve)) ((su triet) OR (su tien))*.