Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hach toan » thanh toan, manh toan
ho chieu » theo chieu, hoc thieu, doi chieu
trang va » tran van, hang va
tac toan » tap toan, tam toan, tich toan

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 trang va ((nhung cong) OR (thong cong)) ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh trang va ((nhung cong) OR (thong cong)) ((tac toan) OR (hach toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh trang va ((nhung cong) OR (thong cong)) ((tac toan) or (hach toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh trang va ((nhung cong) OR (thong cong)) ((tac toan) or (hach toan)) cau*.