Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
hang cong » dang cong, hang nong, bang cong
manh toan » anh tuan, tinh toan

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 - manh ((trung cua) OR (trung cap)) hang cong ((manh toan) or (thanh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - manh ((trung cua) OR (trung cap)) hang cong ((manh toan) OR (thanh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu quang - manh ((trung cua) OR (trung cap)) hang cong ((manh toan) or (thanh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - manh ((trung cua) OR (trung cap)) hang cong ((manh toan) or (thanh toan)) cao*.