Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
lang van » dang van, tang van, hoang van
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((lang xa) OR (lang van)) hoi. hieu va ((cam tuc) or (nam thuc)) ban thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((lang xa) OR (lang van)) hoi. hieu va ((cam tuc) OR (nam thuc)) ban thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((lang xa) OR (lang van)) hoi. hieu va ((cam tuc) or (nam thuc)) ban thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y ((lang xa) OR (lang van)) hoi. hieu va ((cam tuc) or (nam thuc)) ban thanh vi cua triet*.