Perhaps you should try some spelling variations:
khien bang » phien ban, khien dong
hinh trong » chinh trong, dinh trong, sinh trong
trong quan » thong quan, tong quan, thong quang
hien sang » hien trang, chieu sang, thien bang
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
toan cao » toan tap
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 ((hien sang) or (khien bang)) - hinh trong quan dung cong tap ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (khien bang)) - hinh trong quan dung cong tap ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) or (khien bang)) - hinh trong quan dung cong tap ((toan cao) or (toan ban))*.