Perhaps you should try some spelling variations:
phuong danh » phuong anh, phuong dinh, phuong hanh
dung phuong » dung thuong, bang phuong, dung chung
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
danh toan » manh toan, anh toan, dan toan
toan cau » toan cao, toan ban, toan tap
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo chieu)) xanh - hanh ((tran van) OR (luan van)) dung phuong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) xanh - hanh ((tran van) OR (luan van)) dung phuong danh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) xanh - hanh ((tran van) OR (luan van)) dung phuong danh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) xanh - hanh ((tran van) OR (luan van)) dung phuong danh toan cau*.