Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doan phan » doanh phan, toan phan, doanh nhan
trang he » trong he, trang ha, tang he
dan phan » dan chan, van phan, dam phan
tang ma » mang may, tang van

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 ((trang he) or (tang ma)) thong cong ((dan phan) OR (doan phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((trang he) OR (tang ma)) thong cong ((dan phan) OR (doan phan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((trang he) or (tang ma)) thong cong ((dan phan) OR (doan phan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((trang he) or (tang ma)) thong cong ((dan phan) OR (doan phan)) cau*.