Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sach » chinh sach, chiet tach, chieu sang
trinh cua » trinh quan, trinh luan, trinh chat
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » sinh cua, tinh chat, tranh cua
cong hai » cong thai, cong ha, hoang hai
hai toan » bai toan, hai tan, hach toan
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 - hanh ((((trinh cua) OR (tinh cua))) or (trinh luat)) thuong cong hai toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((((trinh cua) OR (tinh cua))) OR (trinh luat)) thuong cong hai toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((((trinh cua) OR (tinh cua))) or (trinh luat)) thuong cong hai toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((((trinh cua) OR (tinh cua))) or (trinh luat)) thuong cong hai toan cao*.