Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
truong cua » truong ca, truong quan, huong cua
truong cao » truong dai
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
tan toan » tan tran, tap toan, van toan
bai toan » bai 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 - thanh ((truong cua) or (truong cao)) hang cong ((tan toan) or (bai toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((truong cua) OR (truong cao)) hang cong ((tan toan) OR (bai toan)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((truong cua) or (truong cao)) hang cong ((tan toan) or (bai toan)) tap*.