Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thang » cong thanh, cang thang, cong thong
hanh dung » thanh dung, anh dung, hanh dong
cong tang » cong tan, cong lang, cong vang
thanh lap » thanh san, phan lap, thanh hai
dung cao » duong cao, dung cho, dung co
cao dong » cao dang, lao dong, cao cong

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 (trieu tinh)) - hanh dung cao dong ((cong tang) OR (cong thang)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (trieu tinh)) - hanh dung cao dong ((cong tang) OR (cong thang)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (trieu tinh)) - hanh dung cao dong ((cong tang) OR (cong thang)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (trieu tinh)) - hanh dung cao dong ((cong tang) OR (cong thang)) thanh lap*.