Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
chung cong » nhung cong, chong cong, phung cong
hoc thieu » toc thieu, hoc hien
tan khang » van khang, tao khang, tinh khang
khang cau » hang cau, khang cu, khang chan
cong tan » cong tac, cong san, cong thanh
luan » quan, lan

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 - thanh ((tran van) OR (luan van)) chung cong tan khang cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - thanh ((tran van) OR (luan van)) chung cong tan khang cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - thanh ((tran van) OR (luan van)) chung cong tan khang cau*.