Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
su triet » su viet, su tien, ve triet
te sach » toc sach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
ki su » ky su

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 _ lang xa hoi. hieu van cam xuc ((ban hanh) or (van hanh)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ lang xa hoi. hieu van cam xuc ((ban hanh) OR (van hanh)) ki su triet.
• Adding a wildcard symbol may retrieve word variants: te sach _ lang xa hoi. hieu van cam xuc ((ban hanh) or (van hanh)) ki su triet*.