Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh hinh » hanh chinh, hanh tinh, hanh dinh
dung manh » duong manh, hung manh, tung manh
dung danh » dung doanh, dung dan, cuong danh
hinh cua » chinh cua, sinh cua, tinh cua
toan cao » toan ban, toan tap
cua van » cua ban, cua vat, cua dan

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 hinh cua van ((dung manh) OR (dung danh)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - hanh hinh cua van ((dung manh) OR (dung danh)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - hanh hinh cua van ((dung manh) OR (dung danh)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - hanh hinh cua van ((dung manh) OR (dung danh)) toan cao*.