Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
cac toc » cac toi, cac nuoc, cac thoi
tai cua » thai cua, tai cuc, tri cua
van anh » tuan anh, van minh
tu sach » thu sach, su sach, tu cach
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
te sach » toc sach
hieu va » lieu va, hieu qua

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) OR (te sach)) ky dang xa hoi. hieu va cac toc ((van anh) OR (van thanh)) tai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky dang xa hoi. hieu va cac toc ((van anh) or (van thanh)) tai cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ky dang xa hoi. hieu va cac toc ((van anh) or (van thanh)) tai cua triet*.