Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
tuan nhung » tuan hung, thuat nhung, tranh nhung
quan nhung » qua nhung, cua nhung, luan chung
hoc chieu » hoc thieu, ho chieu, hoc hien
hach toan » thanh toan, manh toan
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: hoc chieu xanh - hanh trinh ((tuan nhung) OR (quan nhung)) cong ((tac toan) or (hach toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh trinh ((tuan nhung) OR (quan nhung)) cong ((tac toan) OR (hach toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh trinh ((tuan nhung) OR (quan nhung)) cong ((tac toan) or (hach toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh trinh ((tuan nhung) OR (quan nhung)) cong ((tac toan) or (hach toan)) cao*.