Perhaps you should try some spelling variations:
lang thang » cang thang, dang thanh, hung thang
dang thuc » dang thuoc, dan thuc, nang thuc
cong lang » cong vang, cong luong, cong quang
thang van » tang van, thanh van, thong van
doc hieu » hoc thieu, hoc hien
anh dang » anh dong, anh dung, anh bang
thuc dan » thuc hanh, hoc dan, thuc vat
dan cong » dang cong, van cong, dan dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) xanh - anh dang thuc dan cong lang thang van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - anh dang thuc dan cong lang thang van*.