Perhaps you should try some spelling variations:
tranh tran » thanh tran, tranh toan, tranh tren
thieu xanh » chieu xanh, hieu manh, thien danh
quan trong » gian trong
thien anh » thien danh, tien anh, thien thanh
tran quan » tran quang, tran xuan, tran tuan
dang toan » dan toan, dung toan, dang thanh
dang tran » dang thanh, quang tran, hoang tran

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)) - canh tranh tran quan trong ((dang toan) or (dang tran)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - canh tranh tran quan trong ((dang toan) OR (dang tran)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - canh tranh tran quan trong ((dang toan) or (dang tran)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - canh tranh tran quan trong ((dang toan) or (dang tran)) cao*.