Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
theo hop » theo phap, thao hoc, theo ucp
tang cua » mang cua, hang cua, tang luan
cong san » cong tac
theo bo » theo doi, theo don
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 (theo hop))) or (thao bo)) manh - hanh tang cua thong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((theo bo) OR (theo hop))) OR (thao bo)) manh - hanh tang cua thong cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((theo bo) OR (theo hop))) or (thao bo)) manh - hanh tang cua thong cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ((((theo bo) OR (theo hop))) or (thao bo)) manh - hanh tang cua thong cong san van ban*.