Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, hieu nganh
trinh cua » tinh cua, trinh quan, trinh luan
nhung don » nhung van, nhung bo
doc hieu » toc thieu, hoc thieu, hoc hien
ban than » ban thanh, van thanh, ban hang
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh ((trinh cua) OR (trinh luat)) ((nhung don) or (thong cong)) ban than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh ((trinh cua) OR (trinh luat)) ((nhung don) OR (thong cong)) ban than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((trinh cua) OR (trinh luat)) ((nhung don) or (thong cong)) ban than cao".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh ((trinh cua) OR (trinh luat)) ((nhung don) or (thong cong)) ban than cao*.