Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
ve triet » va trien, su 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
hang xa » hoang xa, hang va, hang ca
cua tre » cua te, cuu tre, cua triet
su sach » so sach, vu sach
y hang » ly hang, ty hang, yu hang

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 y hang xa hoi. hieu van cau xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y hang xa hoi. hieu van cau xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y hang xa hoi. hieu van cau xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach y hang xa hoi. hieu van cau xuc ((ban thanh) OR (ban hanh)) vai ((cua tre) or (ve triet))*.