Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hoa » thanh pho
cua triet » cua viet, su triet, va triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cao suc » cao duc
hoa cua » hoa chat, hoa xuat
te cac » tu cac, ve cac, te cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (te cac)) ky nang xa hoi. hieu ve ((cao suc) OR (cao su)) ban thanh hoa cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (te cac)) ky nang xa hoi. hieu ve ((cao suc) OR (cao su)) ban thanh hoa cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (te cac)) ky nang xa hoi. hieu ve ((cao suc) OR (cao su)) ban thanh hoa cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (te cac)) ky nang xa hoi. hieu ve ((cao suc) OR (cao su)) ban thanh hoa cua triet*.