Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thuat tach » thuat sach, thuat mach, thuat tac
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » thong cong, hang cong, nhung don
thuat tai » thuat bai, thuat tao, thuat cai
dung cong » dung trong
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: ho ((thuat tach) or (thuat tai)) - hanh trinh quan ((nhung cong) or (dung cong)) san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((thuat tach) OR (thuat tai)) - hanh trinh quan ((nhung cong) OR (dung cong)) san van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((thuat tach) or (thuat tai)) - hanh trinh quan ((nhung cong) or (dung cong)) san van ban*.