Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tung » thanh tung, manh tung, hanh dung
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cua dung » cua dang, cua dong, qua dung
tap toan » tap quan, bai toan
tap doan » tap quan

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 tung) or (nhanh lang)) cua dung cong ((tap toan) or (tap doan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((hanh tung) OR (nhanh lang)) cua dung cong ((tap toan) OR (tap doan)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((hanh tung) or (nhanh lang)) cua dung cong ((tap toan) or (tap doan)) ban*.