Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trinh » canh tranh, hanh chinh
tieu sach » chieu sach, dien sach, viet sach
trinh vap » trinh van, trinh vat, trinh va
vap thong » va thong, van thong, phap thong
van quan » van ban
te sach » toc sach

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 (te sach)) - hanh trinh vap thong cong ((van quan) OR (dan gian)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((tieu sach) OR (te sach)) - hanh trinh vap thong cong ((van quan) or (dan gian)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((tieu sach) OR (te sach)) - hanh trinh vap thong cong ((van quan) or (dan gian)) cau*.