Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh
quan duong » tuan duong, quan dong, qua duong
hoc thieu » toc thieu, hoc hien
quan dung » quang dung, qua dung, quan dong
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: hoc thieu sach - ((hanh trinh) or (hanh chinh)) ((quan dung) OR (quan duong)) cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((hanh trinh) OR (hanh chinh)) ((quan dung) OR (quan duong)) cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - ((hanh trinh) or (hanh chinh)) ((quan dung) OR (quan duong)) cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((hanh trinh) or (hanh chinh)) ((quan dung) OR (quan duong)) cong san toan tap*.