Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
thong cong » trong cong, tong cong, thong thong
canh tinh » hanh tinh, canh tranh, nhanh tinh
manh tinh » man tinh, manh binh, hanh tinh
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu sach) OR (chinh sach)) - ((canh tinh) or (manh tinh)) he thong cong lang than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu sach) OR (chinh sach)) - ((canh tinh) OR (manh tinh)) he thong cong lang than cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((chieu sach) OR (chinh sach)) - ((canh tinh) or (manh tinh)) he thong cong lang than cao*".