Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham hoi » cham voi, cham h'roi, pham hoai
cham hoc » cham soc, chat hoc, cho hoc
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
hieu ve » hieu va, hieu van
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: tu sach y ((nang xa) or (nang ma)) hoi. hieu ve ((cham hoc) OR (cham hoi)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. hieu ve ((cham hoc) OR (cham hoi)) va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (nang ma)) hoi. hieu ve ((cham hoc) OR (cham hoi)) va hanh vi cua triet*".