Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cong manh » cong danh, duong manh, cong thanh
sinh cua » manh cua, dinh cuu, sinh va
mot cong » moi cong, hoc cong, bo cong
toan cao » toan tap
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 sach) OR (chieu sang)) - hanh sinh cua mot cong manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - hanh sinh cua mot cong manh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chieu sang)) - hanh sinh cua mot cong manh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chieu sang)) - hanh sinh cua mot cong manh ((toan cao) or (toan ban))*.