Perhaps you should try some spelling variations:
tranh tran » thanh tran, tranh toan, tranh tren
thieu xanh » chieu xanh, thien anh, thien danh
quan trong » gian trong
trong mach » trong cac, trong minh, trong anh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tran quan » tran quang, tran xuan, tran tuan
mach toan » manh toan, hach toan, mach tuan
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 (hieu manh)) - canh tranh tran quan trong mach toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - canh tranh tran quan trong mach toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - canh tranh tran quan trong mach toan cao*.