Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh hai » thanh phan, thanh hoa, thanh san
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
hieu van » hieu va, lieu va, hieu ve
cam cac » ca cac, nam cac, cam chan
hai cua » thai cua, dai cua, hoi cua
cac ban » cac dan, cac van, can ban
van hoi » van hoa, van hoc, van hoe
y lang » o lang, _ lang, tay lang
cua te » cua tu

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) or (toc sach)) y lang van hoi. ((hieu van) OR (thien van)) cam cac ban thanh hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y lang van hoi. ((hieu van) OR (thien van)) cam cac ban thanh hai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) y lang van hoi. ((hieu van) OR (thien van)) cam cac ban thanh hai cua te*".