Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh toan » thanh toan, tinh toan
manh cua » doanh cua, ban cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (thien hach)) - canh manh cua nhung cong ((manh toan) OR (anh tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien hach)) - canh manh cua nhung cong ((manh toan) OR (anh tuan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (thien hach)) - canh manh cua nhung cong ((manh toan) OR (anh tuan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien hach)) - canh manh cua nhung cong ((manh toan) OR (anh tuan)) tap*.