Perhaps you should try some spelling variations:
thanh khung » thanh hung, thanh chuong, thanh phuong
luan hung » luan chung, lan hung, tuan hung
cong sang » cong san, cong lang, cong vang
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
luan ung » luon ung, luan chung, luan luong
sang tao » hang tai
tao cao » bao cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - thanh khung ((luan hung) or (luan ung)) cong sang tao cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh khung ((luan hung) OR (luan ung)) cong sang tao cao.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh khung ((luan hung) or (luan ung)) cong sang tao cao*.