Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
tieu sach » chieu sach, te sach, viet sach
dien sach » dien anh
trinh vap » trinh van, trinh vat, trinh va
vap nhung » va nhung, ve nhung, voi nhung
van tuan » van quan, van ban, anh tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((tieu sach) OR (dien sach)) - hanh trinh vap nhung cong ((van tuan) OR (dan gian)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) OR (dien sach)) - hanh trinh vap nhung cong ((van tuan) or (dan gian)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) OR (dien sach)) - hanh trinh vap nhung cong ((van tuan) or (dan gian)) cau*.