Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong duong » cuong duong, cong dong, con duong
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
duong van » duong va, luong va, dang van
van tang » van thang, van trang, van nang
tang ban » tang bang, tiang ban, tang van

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 sach) or (((hieu lang) OR (chieu sang)))) - hanh tranh cua cong duong van tang ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (((hieu lang) OR (chieu sang)))) - hanh tranh cua cong duong van tang ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (((hieu lang) OR (chieu sang)))) - hanh tranh cua cong duong van tang ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (((hieu lang) OR (chieu sang)))) - hanh tranh cua cong duong van tang ban*.