Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
cua trong » cua truong, cua trung, ca trong
qua trong » quan trong, qua trinh, qua song
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran huu » tran duc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (chieu sang)) - hanh tranh ((cua trong) OR (qua trong)) cong tac tran huu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - hanh tranh ((cua trong) OR (qua trong)) cong tac tran huu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chieu sang)) - hanh tranh ((cua trong) OR (qua trong)) cong tac tran huu".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - hanh tranh ((cua trong) OR (qua trong)) cong tac tran huu*.