Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
nang cong » nang song, dang cong, hang cong
bang cong » dang cong, bang song, hang cong
trinh va » trinh van, trinh vat, trinh ve
van tuan » van quan, van ban, anh tuan
tuan cu » tuan tu, quan cua, tuan thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu xanh) OR (chieu sach)) - hanh trinh va ((nang cong) or (bang cong)) van tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - hanh trinh va ((nang cong) OR (bang cong)) van tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) OR (chieu sach)) - hanh trinh va ((nang cong) or (bang cong)) van tuan cu".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) OR (chieu sach)) - hanh trinh va ((nang cong) or (bang cong)) van tuan cu*.