Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
cua thuong » cua truong, cua phuong, ca thuong
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cong san » cong tac
theo bo » theo doi, theo don, theo hop
thao bo » tao bo, thac bao, thao hoc
san van » tan van, luan van, tran 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 bo) or (thao bo)) manh - ((hanh tang) OR (hanh mang)) cua thuong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo bo) OR (thao bo)) manh - ((hanh tang) OR (hanh mang)) cua thuong cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo bo) or (thao bo)) manh - ((hanh tang) OR (hanh mang)) cua thuong cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ((theo bo) or (thao bo)) manh - ((hanh tang) OR (hanh mang)) cua thuong cong san van ban*.