Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
thang cua » thong cua, hang cua, than cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tang cua » mang cua, hang cua, tang luan
san chan » san chang, dan chan, san chay
chan tu » phan tu, han tu, chon tu

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 ((thang cua) or (tang cua)) ((hang cong) or (bang cong)) san chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh ((thang cua) OR (tang cua)) ((hang cong) OR (bang cong)) san chan tu.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh ((thang cua) or (tang cua)) ((hang cong) or (bang cong)) san chan tu*.