Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
hoc thieu » toc thieu, hoc hien
trung kha » trung khoa, trung ha, truong khoa
dung cong » dung trong
kha dung » khoa dung, khao dung, nha dung
dan toan » manh toan, xuan toan, dien toan
van toan » van tuan, van tan, van thanh
dan than » dan chan, ban than, van than

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