Perhaps you should try some spelling variations:
trong quang » truong quang, thong quang, trong quan
quang toan » quang tuan, quang tran, quang doan
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh dong » anh dong, ha dong
dong luan » dung luan, tong luan, dong xuan
luan dung » lan dung, luan dong, luan hung
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) OR (hieu manh)) - hanh dong luan dung trong quang toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu manh)) - hanh dong luan dung trong quang toan cao".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu manh)) - hanh dong luan dung trong quang toan cao*.