Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
cam thuc » nam thuc, cam thu, can thuc
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
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 (so sach)) van nang xa hoi. hieu van ((cam thuc) or (am thuc)) va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) van nang xa hoi. hieu van ((cam thuc) OR (am thuc)) va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) van nang xa hoi. hieu van ((cam thuc) or (am thuc)) va hanh vi cua triet*.