Perhaps you should try some spelling variations:
nhung phong » nhung phuong, nhung chong, nung phong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
phong van » phung van, thong van, phong va
hoc chau » moc chau, hoc cau, hoc chan
hoc chat » hoc phat, hoc cao, hoc phan
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chau) OR (hoc chat)) tinh - hanh tranh cua nhung phong van tuan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chau) OR (hoc chat)) tinh - hanh tranh cua nhung phong van tuan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chau) OR (hoc chat)) tinh - hanh tranh cua nhung phong van tuan ban*.