Perhaps you should try some spelling variations:
trien thuat » thien thuat, trien hoat, chien thuat
chieu sang » chieu sach, chieu xanh, hieu lang
chinh thuc » chinh phuc, hinh thuc, trinh thuc
duong manh » duong van
cong manh » cong danh, cong thanh, hoang manh
ho chieu » theo chieu, hoc thieu, doi chieu
toan ban » van ban

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 sang - hanh ((chinh thuc) or (trien thuat)) nhung ((cong manh) OR (duong manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((chinh thuc) OR (trien thuat)) nhung ((cong manh) OR (duong manh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh ((chinh thuc) or (trien thuat)) nhung ((cong manh) OR (duong manh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((chinh thuc) or (trien thuat)) nhung ((cong manh) OR (duong manh)) toan ban*.