Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thang vat » thang va, hang vat, hang va
dung cong » dung trong
tang vat » tang van, dang vat, bang vat
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan ban

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