Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
soc ban » hoc ban, coc ban, so ban
hieu ve » hieu va
sach ky » sac ky, sach y, sach kem
tang ha » lang ha, tang ma, trung ha
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi

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 ky) or (sach ty)) tang ha hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) tang ha hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh van cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach ty)) tang ha hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh van cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) tang ha hoi. ((hieu ve) OR (hieu van)) cham soc ban thanh van cua tre*.