Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
cac tuc » cac toc, cac tu, cac tac
dan vai » dan va, dan tai, den vai
dan vat » dang vat, van vat, dan va
tuc va » thuc va, truc va, tuc xa

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 ky dang xa hoi. lieu va cac tuc va ((dan vai) OR (dan vat)) su triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. lieu va cac tuc va ((dan vai) or (dan vat)) su triet*.