Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
tinh trang » minh trang, tinh quang, tinh toan
hanh trinh » canh tranh, hanh chinh
cua trung » cua truong, xuan trung, cua nhung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
toan cao » toan ban, toan tap

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