Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
thieu sang » thieu khang, thieu quang, hieu lang
chieu sang » chieu sach, chieu xanh, hieu lang
truong cao » truong dai
ung trong » dung trong, cung trong, vung trong
quan toan » quang toan, xuan toan, quan hoang
quan doan » quan hoang, chuan doan, chan doan
cao ung » cao dung, cac ung, cho ung

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 sang) OR (chieu sang)) - hanh truong cao ung trong ((quan toan) or (quan doan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu sang)) - hanh truong cao ung trong ((quan toan) OR (quan doan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (chieu sang)) - hanh truong cao ung trong ((quan toan) or (quan doan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (chieu sang)) - hanh truong cao ung trong ((quan toan) or (quan doan)) cao*.