Perhaps you should try some spelling variations:
dong luong » cong luong, dong duong, dong huong
nhiet tach » chiet tach
hoc nhiet » hoc thiet, hoc nghien, hoc hien
tang luan » dung luan
luong tai » dung tai, luong va
tang cua » mang cua, hang cua, thong cua
tai toan » bai toan, tap toan, tai tuan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - anh ((tang cua) or (tang luan)) dong luong tai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - anh ((tang cua) OR (tang luan)) dong luong tai toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - anh ((tang cua) or (tang luan)) dong luong tai toan ban*.