Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
kha nang » phap nang, ky nang, ki nang
cam thuc » nam thuc, cam thu, can thuc
vat hanh » vat thanh, van hanh, va hanh
su sach » so sach, vu sach
ha nang » hoa nang, da nang, ha tang
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: su sach ((ha nang) OR (kha nang)) xa hoi. hieu ve ((cam thuc) or (am thuc)) vat hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ha nang) OR (kha nang)) xa hoi. hieu ve ((cam thuc) OR (am thuc)) vat hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ha nang) OR (kha nang)) xa hoi. hieu ve ((cam thuc) or (am thuc)) vat hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((ha nang) OR (kha nang)) xa hoi. hieu ve ((cam thuc) or (am thuc)) vat hanh vi cua triet*.