Perhaps you should try some spelling variations:
quang trong » quang truong, quang trung, quan trong
hanh trang » thanh trung, hanh trinh, minh trang
thieu xanh » chieu xanh, hieu manh, thien danh
trong dung » thong dung, trung dung, trong rung
thien anh » thien danh, tien anh, thien thanh
dung toan » dung doanh, dung thang, dung thanh
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: hoc ((thieu xanh) OR (thien anh)) - ((hanh trang) or (canh tranh)) tran quang trong dung toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - ((hanh trang) OR (canh tranh)) tran quang trong dung toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - ((hanh trang) or (canh tranh)) tran quang trong dung toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - ((hanh trang) or (canh tranh)) tran quang trong dung toan cao*.