Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
cong tuan » cong tan, cong luan, cong thanh
trinh va » trinh van, trinh vat, trinh ve
ban ban » ban banh, can ban, ban dan
doi co » doi bo, hoi co, noi co
moi co » mai co

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi co) or (moi co)) sach - hanh trinh va nhung cong tuan ((ban ban) OR (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi co) OR (moi co)) sach - hanh trinh va nhung cong tuan ((ban ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi co) or (moi co)) sach - hanh trinh va nhung cong tuan ((ban ban) OR (van ban))".
• Adding a wildcard symbol may retrieve word variants: ((doi co) or (moi co)) sach - hanh trinh va nhung cong tuan ((ban ban) OR (van ban))*.