Perhaps you should try some spelling variations:
trinh thiet » trinh thi
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh viet » ninh viet, trinh vat
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - hanh ((trinh thiet) or (trinh viet)) ((nhung cong) OR (dung cong)) manh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh ((trinh thiet) OR (trinh viet)) ((nhung cong) OR (dung cong)) manh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trinh thiet) or (trinh viet)) ((nhung cong) OR (dung cong)) manh toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trinh thiet) or (trinh viet)) ((nhung cong) OR (dung cong)) manh toan tap*.