Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
thu hanh » thuc hanh, thu thanh, thuy hanh
sach thu » sach thue, sach thieu, sach tham
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
hanh xa » hanh va, hanh ma, hanh xu
lam va » nam va, dam va, am va
lam ha » nam ha, dam ha, lam chat

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 thu hanh xa hoi. ((hieu ve) or (hieu van)) cam xuc ban thanh ((lam va) or (lam ha)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu hanh xa hoi. ((hieu ve) OR (hieu van)) cam xuc ban thanh ((lam va) OR (lam ha)) triet.
• Adding a wildcard symbol may retrieve word variants: tu sach thu hanh xa hoi. ((hieu ve) or (hieu van)) cam xuc ban thanh ((lam va) or (lam ha)) triet*.