Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
canh sinh » canh tinh, canh binh, tinh sinh
vat hang » van hang, va hang, mat hang
dat hang » dat khanh, dat quang, tat thang
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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 sach) or (chieu sang)) - canh sinh ((vat hang) OR (dat hang)) cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - canh sinh ((vat hang) OR (dat hang)) cong dan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - canh sinh ((vat hang) OR (dat hang)) cong dan phan dau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - canh sinh ((vat hang) OR (dat hang)) cong dan phan dau*.