Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
theo chieu » theo tieu, ho chieu, theo chu
huong doan » phuong doan, huong dan, huong loan
thi chieu » thi chien, thi hieu, thi hien
tang luan » dung luan
doan phan » doanh phan, toan phan, dan phan
tang cua » mang cua, hang cua, thong cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (thi chieu)) xanh - hanh ((tang cua) OR (tang luan)) nhung huong doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (thi chieu)) xanh - hanh ((tang cua) OR (tang luan)) nhung huong doan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (thi chieu)) xanh - hanh ((tang cua) OR (tang luan)) nhung huong doan phan tu".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (thi chieu)) xanh - hanh ((tang cua) OR (tang luan)) nhung huong doan phan tu*.