Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tuong dan » huong dan, tung dan, xuong dan
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
than phan » thanh phan, toan phan, thanh pham
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh tuong dan ((dung cong) or (hang cong)) than phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tuong dan ((dung cong) OR (hang cong)) than phan lap.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tuong dan ((dung cong) or (hang cong)) than phan lap*.