Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
dai khung » dai khong, dam khung, dai khoang
dap nhung » vap nhung, va nhung, dap ung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van 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 sang - hanh trinh ((dai khung) or (dap nhung)) cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh trinh ((dai khung) OR (dap nhung)) cong tac toan ban*.