Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
hieu van » lieu va, hieu ve
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
lam duc » lam duoc, pham duc, nam duoc
van cua » vang cua, ban cua, dan cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. ((((hieu van) OR (hieu va))) or (thien van)) lam duc tan thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((((hieu van) OR (hieu va))) OR (thien van)) lam duc tan thanh van cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((((hieu van) OR (hieu va))) or (thien van)) lam duc tan thanh van cua triet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((((hieu van) OR (hieu va))) or (thien van)) lam duc tan thanh van cua triet*.