Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien danh » thien anh, thien dang, thien chanh
khong cong » thong cong, khong cang, chong cong
chinh hua » chinh cua, chinh phuc, chinh luan
chinh sua » chinh su, chinh cua, chinh luan
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) or (thien danh)) - hanh ((chinh hua) OR (chinh sua)) khong cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thien danh)) - hanh ((chinh hua) OR (chinh sua)) khong cong tan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (thien danh)) - hanh ((chinh hua) OR (chinh sua)) khong cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (thien danh)) - hanh ((chinh hua) OR (chinh sua)) khong cong tan van ban*.