Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
dac khoa » dai khoa, dau khoa, cac khoan
thanh te » thanh ve, thanh de, thanh le
duc van » duc va, duc tan, duc manh
tu cham » toc cham, thi cham
cua tre » cua te, cuu tre, cua triet
vu cham » va cham, vu kham, qua cham
lang ha » long ha
te cua » tue cua, le cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((dac khoa) OR (da khoa)) lang ha noi. hieu ((vu cham) or (tu cham)) duc van thanh te cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((dac khoa) OR (da khoa)) lang ha noi. hieu ((vu cham) OR (tu cham)) duc van thanh te cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((dac khoa) OR (da khoa)) lang ha noi. hieu ((vu cham) or (tu cham)) duc van thanh te cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((dac khoa) OR (da khoa)) lang ha noi. hieu ((vu cham) or (tu cham)) duc van thanh te cua tre*.