Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
manh toan » thanh toan, anh tuan, tinh toan
van toan » van tuan, van tan, van thanh

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