Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh thuc » trinh tu, trinh thi
trinh toan » tinh toan, thanh toan, trinh han
hoc thieu » toc thieu, hoc hien
trinh chu » trinh cau, trinh cho, trinh chat
bang cong » dang cong, bang song, hang cong
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 - hanh ((trinh chu) OR (trinh thuc)) bang cong trinh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - hanh ((trinh chu) OR (trinh thuc)) bang cong trinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - hanh ((trinh chu) OR (trinh thuc)) bang cong trinh toan cao*.