Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trung » thanh trung, hanh trang, manh trung
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
va thong » va thuong, va phuong, he thong
tan toan » tap toan, van toan, dan toan

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 - ((hanh trung) or (thanh tung)) va thong cong ((tan toan) OR (tan tran)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - ((hanh trung) OR (thanh tung)) va thong cong ((tan toan) OR (tan tran)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - ((hanh trung) or (thanh tung)) va thong cong ((tan toan) OR (tan tran)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - ((hanh trung) or (thanh tung)) va thong cong ((tan toan) OR (tan tran)) ban*.