Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, va tinh, le thanh
lam tuc » lam thuoc, lam truoc, luat tuc
van lam » van nam
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » xa hoi, ma hoa, me hoi
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((ma hoi) OR (mai hoi)). hieu van lam tuc ((va thanh) or (ban thanh)) le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (mai hoi)). hieu van lam tuc ((va thanh) OR (ban thanh)) le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((ma hoi) OR (mai hoi)). hieu van lam tuc ((va thanh) or (ban thanh)) le cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((ma hoi) OR (mai hoi)). hieu van lam tuc ((va thanh) or (ban thanh)) le cua tre*.