Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
cac truc » cau truc, cac tru, cac trung
dan khai » dang khai, van khai, dang khoi
su triet » su viet, su tien, ve triet
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
truc va » thuc va, thuc vat, trung va
va dan » ca dan, va dao, va dau

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 truc va dan khai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu va cac truc va dan khai ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu va cac truc va dan khai ((cua triet) or (su triet))*.