Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua
dung cong » dung trong
luan phan » luan van, luan hoan
hoc hieu » hoc thieu, hoc hien, doc hieu
manh cua » doanh cua, ban cua
tan phan » toan phan, than phan, van phan

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 - canh ((tranh cua) or (manh cua)) dung cong ((tan phan) or (luan phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh ((tranh cua) OR (manh cua)) dung cong ((tan phan) OR (luan phan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh ((tranh cua) or (manh cua)) dung cong ((tan phan) or (luan phan)) cau*.