Perhaps you should try some spelling variations:
manh truong » manh trung, manh tuong, anh truong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong tinh » cong trinh, cong vinh, long tinh
dai dang » da dang, dai nang, hai dang
mai dung » mai hung, mai huong, manh dung
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)) - manh truong ((dai dang) or (mai dung)) cong tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - manh truong ((dai dang) OR (mai dung)) cong tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - manh truong ((dai dang) or (mai dung)) cong tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - manh truong ((dai dang) or (mai dung)) cong tinh toan cao*.