Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trang cua » tranh cua, trung cua, thang cua
hoc hieu » hoc thieu, hoc hien, doc hieu
tang cua » mang cua, hang cua, tang luan
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh ((trang cua) or (tang cua)) nhung cong ((dan than) OR (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trang cua) OR (tang cua)) nhung cong ((dan than) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((trang cua) or (tang cua)) nhung cong ((dan than) OR (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trang cua) or (tang cua)) nhung cong ((dan than) OR (dan chan)) cau*.