Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach, vu sach
co sach » bo sach, cuon sach, hoc sach
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
tuc va » thuc va, truc va, tuc xa

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 (co sach)) ky nang x ho. ((hieu van) OR (thien van)) cau tuc va hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (co sach)) ky nang x ho. ((hieu van) OR (thien van)) cau tuc va hanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (co sach)) ky nang x ho. ((hieu van) OR (thien van)) cau tuc va hanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (co sach)) ky nang x ho. ((hieu van) OR (thien van)) cau tuc va hanh doi cua triet*.