Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
chinh thiet » trinh thiet, chinh tien, hanh thiet
chinh viet » ninh viet, trinh viet, dinh viet
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, hung cuong, phung cong
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan 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 thieu quang - hanh ((chinh thiet) OR (chinh viet)) hung cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - hanh ((chinh thiet) OR (chinh viet)) hung cong dan ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - hanh ((chinh thiet) OR (chinh viet)) hung cong dan ((toan cao) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - hanh ((chinh thiet) OR (chinh viet)) hung cong dan ((toan cao) or (toan tap))*.