Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong vang » cong lang, cong quang, cong ngang
doc hieu » toc thieu, hoc thieu, hoc hien
cong van » cong san, song van, cong tan
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau
chat » nhat, phat

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 manh - hanh tinh chat ngung ((cong van) OR (cong vang)) ((phan cac) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh tinh chat ngung ((cong van) OR (cong vang)) ((phan cac) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - hanh tinh chat ngung ((cong van) OR (cong vang)) ((phan cac) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh tinh chat ngung ((cong van) OR (cong vang)) ((phan cac) or (phan dau))*.