Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
chat duc » chat xuc, chat doc, chet duoc
van chat » cao chat
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
duc ban » duc tan, duc van, dua ban
cua tu » cua tuc, cua su, cua cu
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (so sanh)) ky nang ((o hoi) OR (o hoc)). hieu van chat duc ban thanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (so sanh)) ky nang ((o hoi) OR (o hoc)). hieu van chat duc ban thanh dai cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (so sanh)) ky nang ((o hoi) OR (o hoc)). hieu van chat duc ban thanh dai cua tu*".