Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chat nhung » chat ngung, thuat nhung, cua nhung
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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: ho ((chieu sach) or (lieu tinh)) - hanh tinh chat nhung cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (lieu tinh)) - hanh tinh chat nhung cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (lieu tinh)) - hanh tinh chat nhung cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (lieu tinh)) - hanh tinh chat nhung cong san ((toan cau) OR (toan cao))*.