Perhaps you should try some spelling variations:
thanh vai » thanh van, thanh tai, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang o hoi. hieu van cau xuc va ((thanh vai) OR (thanh hai)) ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu van cau xuc va ((thanh vai) OR (thanh hai)) ((va triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang o hoi. hieu van cau xuc va ((thanh vai) OR (thanh hai)) ((va triet) or (su triet))*".