Perhaps you should try some spelling variations:
quang dung » quang trung, ung dung, cuong dung
hanh trang » thanh trung, hanh trinh, minh trang
tieu sach » chieu sach, dien sach, te sach
qua dung » su dung, qua song, qua cong
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: theo tieu sach - ((hanh trang) or (canh tranh)) ((qua dung) OR (quang dung)) cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh trang) OR (canh tranh)) ((qua dung) OR (quang dung)) cong van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((hanh trang) or (canh tranh)) ((qua dung) OR (quang dung)) cong van toan cao".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh trang) or (canh tranh)) ((qua dung) OR (quang dung)) cong van toan cao*.