Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
tran thanh » ban thanh, van thanh, quan thanh
luat dong » luat cong, luat bong, luan dong
dong cong » duong cong, dung cong, dang cong
tan than » tan thanh, tan tran, ban than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (chieu sach)) - hanh trinh luat dong cong ((tan than) or (tran thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - hanh trinh luat dong cong ((tan than) OR (tran thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (chieu sach)) - hanh trinh luat dong cong ((tan than) or (tran thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (chieu sach)) - hanh trinh luat dong cong ((tan than) or (tran thanh)) cau*.