Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
quan nhung » qua nhung, cua nhung, luan chung
hoc thieu » toc thieu, hoc hien
cua chung » cua nhung, luan chung, luat chung
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: hoc thieu sach - hanh trinh ((quan nhung) or (cua chung)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh ((quan nhung) OR (cua chung)) cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh ((quan nhung) or (cua chung)) cong dan toan cau*.