Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thang long » thanh cong
dong thanh » truong thanh
thanh toan » thanh hoa, thanh san, tinh toan
long gian » long giao, luong giao, khong gian
gian lang » gian dan
lang dong » lang trong, lao dong, cong dong
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (dieu hanh)) - thang long gian lang dong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (dieu hanh)) - thang long gian lang dong thanh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (dieu hanh)) - thang long gian lang dong thanh toan cau*.