Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
phuong anh » phuong hoang
hien manh » hien hanh, tien manh, hieu manh
trang va » hang va
tran van » luan van
anh toan » manh toan, anh tuan, thanh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien manh - hanh ((trang va) or (tran van)) dung phuong anh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien manh - hanh ((trang va) OR (tran van)) dung phuong anh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien manh - hanh ((trang va) or (tran van)) dung phuong anh toan cau*.