Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
va triet » va thiet, va trien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
lam quoc » lam duoc, nam quoc, lam thuoc
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
hang xa » hoang xa, hang va, hang ca
van lam » van nam

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