Perhaps you should try some spelling variations:
ban thanh » ban hang
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
ban hanh » ban hang
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren

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 tu nang x ho. hieu van tham nuoc ((ban hanh) or (ban thanh)) vi ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang x ho. hieu van tham nuoc ((ban hanh) OR (ban thanh)) vi ((cuu tre) OR (cua tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang x ho. hieu van tham nuoc ((ban hanh) or (ban thanh)) vi ((cuu tre) OR (cua tre))*".