Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
hanh trong » hanh trang, anh trong, hinh trong
hoc thieu » toc thieu, hoc hien
trong su » trong san, trong thu, trong qua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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 quang - hanh trong su dung ((cong dan) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - hanh trong su dung ((cong dan) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - hanh trong su dung ((cong dan) or (cong tan)) toan cao*.