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