Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
dan phan » doan phan, van phan, dam phan
dan chan » dan gian, dan ca, van chat
manh va » anh va, minh va, lanh va
hanh va » hang va, hanh vi

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