Perhaps you should try some spelling variations:
nhanh trinh » hanh trinh, nhanh tinh, thanh trinh
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » tong cong, thong thong, phong chong
bien tinh » bi tinh, yen tinh, diep tinh
trinh cua » tinh cua, trinh luat, trinh quan
san toan » van toan, dan toan, manh 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) or (bien tinh)) - nhanh trinh cua ((thong cong) OR (trong cong)) san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (bien tinh)) - nhanh trinh cua ((thong cong) OR (trong cong)) san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (bien tinh)) - nhanh trinh cua ((thong cong) OR (trong cong)) san toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (bien tinh)) - nhanh trinh cua ((thong cong) OR (trong cong)) san toan cao*.