Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
sach tru » sach truc, sach thu, sach tren
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
sach tu » sach thu, cach tu, sach ty
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
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 tru) OR (sach tu)) nang xa hoi. hieu van cac xuc ((va hanh) or (ban hanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tru) OR (sach tu)) nang xa hoi. hieu van cac xuc ((va hanh) OR (ban hanh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tru) OR (sach tu)) nang xa hoi. hieu van cac xuc ((va hanh) or (ban hanh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach tru) OR (sach tu)) nang xa hoi. hieu van cac xuc ((va hanh) or (ban hanh)) vi cua triet*.