Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » hieu nganh, dieu hanh, hien hanh
trung ha » trung hoc, trung tam, trung cap
ha nhung » hoa nhung, hay nhung, pha nhung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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) OR (chieu xanh)))) - thanh trung ha nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (((hieu manh) OR (chieu xanh)))) - thanh trung ha nhung cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (((hieu manh) OR (chieu xanh)))) - thanh trung ha nhung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (((hieu manh) OR (chieu xanh)))) - thanh trung ha nhung cong dan toan cao*.