Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang khoi » dung khoa, hang khoa
dang khai » quang khai, dang thi, dang nhat
dang hai » hang hai, dung hai, dong hai
sach ky » sac ky, sach y, sach ty
te sach » toc sach
cac toc » cac toi, cac nuoc, cac thoi
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
toc va » hoc va, toc ta, tuc va

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 cac toc va ((((dang khai) OR (dang hai))) or (dang khoi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va cac toc va ((((dang khai) OR (dang hai))) OR (dang khoi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu va cac toc va ((((dang khai) OR (dang hai))) or (dang khoi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va cac toc va ((((dang khai) OR (dang hai))) or (dang khoi)) cua triet*.