Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dan vat » dang vat, van vat, dan dat
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
te sach » toc sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cac tuc » cac toc, cac tu, cac tac
tuc va » thuc va, truc va, tuc xa
dan va » doan va, dan ca, ban 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 ((nang xa) OR (lang xa)) hoi. hieu va cac tuc va ((dan vat) or (dan va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (lang xa)) hoi. hieu va cac tuc va ((dan vat) OR (dan va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (lang xa)) hoi. hieu va cac tuc va ((dan vat) or (dan va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (lang xa)) hoi. hieu va cac tuc va ((dan vat) or (dan va)) cua triet*.