Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu cao » chieu cao, hieu cac, hieu ca
chat xuc » chat huu, cam xuc, chao xu
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
van anh » tuan anh, van minh
lam va » nam va, dam va, lam ha
x hoi » o hoi, x ho, 5 hoi

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 tu nang ((x hoi) or (xa hoi)). hieu cao chat xuc ((van anh) OR (van thanh)) lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang ((x hoi) OR (xa hoi)). hieu cao chat xuc ((van anh) OR (van thanh)) lam va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach tu nang ((x hoi) or (xa hoi)). hieu cao chat xuc ((van anh) OR (van thanh)) lam va triet".
• Adding a wildcard symbol may retrieve word variants: su sach tu nang ((x hoi) or (xa hoi)). hieu cao chat xuc ((van anh) OR (van thanh)) lam va triet*.