Perhaps you should try some spelling variations:
lang thang » cang thang, dang thanh, hung thang
doi chieu » doc hieu, doi chi, mot chieu
cong lang » cong vang, cong luong, cong quang
thang dat » thanh dat, hang dau, thang tam
thai hoc » dai hoc, bai hoc, thai do
hoc thuc » hoc huu
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: ((doi chieu) or (toc thieu)) sach - thai hoc thuc dan cong lang thang dat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thai hoc thuc dan cong lang thang dat*.