Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
chieu sach » chinh sach, chiet tach, chieu sang
canh manh » lanh manh, canh tranh, cach mang
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
toan tai » toan tap, doanh tai, toan ban
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 - canh manh cua ((nhung cong) OR (hang cong)) dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh manh cua ((nhung cong) OR (hang cong)) dan ((toan tai) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh manh cua ((nhung cong) OR (hang cong)) dan ((toan tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh manh cua ((nhung cong) OR (hang cong)) dan ((toan tai) or (toan cao))*.