Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
tranh hang » trinh han, tran hoang, tran hong
thong cong » trong cong, tong cong, thong thong
hanh hang » thanh hang, hang hang, hanh han
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 (chinh sach)) - ((hanh hang) or (tranh hang)) va thong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - ((hanh hang) OR (tranh hang)) va thong cong dan toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - ((hanh hang) or (tranh hang)) va thong cong dan toan cau*".