Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
doc hieu » toc thieu, hoc hien
nhung bo » nhung bi, nhung bai, nhung don
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) or (doc hieu)) sach - hanh trinh cua ((nhung bo) or (hang cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) sach - hanh trinh cua ((nhung bo) OR (hang cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) sach - hanh trinh cua ((nhung bo) or (hang cong)) dan toan cau*.