Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
chanh vai » hanh va, thanh van, chinh va
dang xay » dang van, van xay
suc minh » suc manh, duc minh, vu minh
sach ky » sac ky, sach y, sach ty
cao suc » cao su, cao duc
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va cao » va cac, va co, va dao

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang xay) OR (nang x)) hoi. hieu va cao suc minh ((chanh vai) OR (hanh vi)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((dang xay) or (nang x)) hoi. hieu va cao suc minh ((chanh vai) OR (hanh vi)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang xay) or (nang x)) hoi. hieu va cao suc minh ((chanh vai) OR (hanh vi)) cua triet*.