Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo yeu » theo tieu, thiet yeu, theo chu
yeu tinh » yeu tin, lieu tinh, kieu tinh
quan van » luan van, quan va, quan luan
hong van » hoang van, thong van, phong van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu
qua ban » cua ban, qua quan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo yeu tinh - hanh trinh ((quan van) OR (qua ban)) hong van tuan cau~.
• Adding a wildcard symbol may retrieve word variants: theo yeu tinh - hanh trinh ((quan van) or (qua ban)) hong van tuan cau*.