Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hanh trong » hanh trang, anh trong, hinh trong
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
trong am » trong lam, trong nam, trong dam
hanh mau » thanh mau, anh mau, hanh ma
am dung » am duong, lam dung, ap dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu khang - hanh trong am dung cong quang ((hanh mau) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - hanh trong am dung cong quang ((hanh mau) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - hanh trong am dung cong quang ((hanh mau) or (thanh san))*.