Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hang truc » khung truc
hieu van » hieu va, thien van, lieu va
van hang » van khang, van hoang, van thang
ban hanh » ban hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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 ky nang xa hoi. hieu van hang truc ((ban hanh) or (van thanh)) ((vi cua) OR (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu van hang truc ((ban hanh) OR (van thanh)) ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu van hang truc ((ban hanh) or (van thanh)) ((vi cua) OR (di cua)) tre*".