Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
hang hang » cang thang, hung thang, lang thang
nang hang » nang sang, cang thang, lang thang
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong ty
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: ho chieu sach - ((hang hang) or (nang hang)) va nhung ((cong tan) OR (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hang hang) OR (nang hang)) va nhung ((cong tan) OR (cong thanh)) toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hang hang) or (nang hang)) va nhung ((cong tan) OR (cong thanh)) toan cau*".