Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, nam truc, lam truoc
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, mang xa
ve cam » ve cham, ve cac, va cam
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) OR (vu sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cam truc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y ((nang xa) OR (nang ma)) hoi. hieu ve cam truc va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) y ((nang xa) or (nang ma)) hoi. hieu ve cam truc va hanh vi cua triet*".