Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
hang cong » hang nong, bang cong, thong cong
dang cong » dung cong
manh toan » thanh toan, anh tuan, tinh toan
trinh he » trinh han, trinh hoa, trinh thi
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: doi chieu sach - hanh trinh he ((((hang cong) OR (thanh cong))) or (dang cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh he ((((hang cong) OR (thanh cong))) OR (dang cong)) manh toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trinh he ((((hang cong) OR (thanh cong))) or (dang cong)) manh toan ban*".