Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hanh dan » thanh dan, hanh san, canh dan
dan toan » van toan, dan than, manh toan
toan ban » van ban
dan cua » dan ca, ban cua, dai 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 chieu sach - hanh dan cua ((nhung cong) or (trong cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh dan cua ((nhung cong) OR (trong cong)) dan toan ban*.