Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((chieu tinh) or (chieu sach))) or (chieu sang)) - canh tranh cua thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu tinh) OR (chieu sach))) OR (chieu sang)) - canh tranh cua thong cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu tinh) or (chieu sach))) or (chieu sang)) - canh tranh cua thong cong dan van ban*.