Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
thu sang » thu hang, thu san, thu bang
cham cuu » cap cuu, chat cua
van cua » vang cua, ban cua, dan cua
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sang ky » sang kyo, dang ky, tang ky
lang ha » long ha
tang ha » tang ma, trung ha, tang van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sang ky ((tang ha) or (lang ha)) noi. hieu vu cham cuu ((van thanh) or (ban thanh)) van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sang ky ((tang ha) OR (lang ha)) noi. hieu vu cham cuu ((van thanh) OR (ban thanh)) van cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sang ky ((tang ha) or (lang ha)) noi. hieu vu cham cuu ((van thanh) or (ban thanh)) van cua tre*.