Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
dang xay » dang van, van xay
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
dang xa » lang xa, dang ha, dang va
ve cac » va cac, vien cac

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