Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lieu tinh » trieu tinh, diep tinh, bien tinh
hanh manh » hanh mang, lanh manh, hoang manh
dang nong » hang nong, tang nong, dang hoang
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
manh cua » doanh cua, ban cua
toan tap » toan ban

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

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