Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
tieu sach » chieu sach, dien sach, te sach
dung cong » dung trong
hanh san » thanh san, khach san, thanh son
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
san cua » sang cua, ban cua, dan cua

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 san cua ((nhung cong) or (dung cong)) san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh san cua ((nhung cong) OR (dung cong)) san toan cau*.