Perhaps you should try some spelling variations:
dang khai » dang khoi, quang khai, dang thi
cua triet » cua viet, su triet, va triet
van khai » van hai, van khi, dan khai
dang hai » hang hai, dung hai, dong hai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc va » thuc va, truc va, tuc xa

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