Perhaps you should try some spelling variations:
nghien tach » nghiep cach, nghiep sach, nghiem sach
hoc nghien » hoc hien
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong manh » duong manh, cong thanh, hoang manh
cong danh » cuong danh, cong dan, cong thanh
toan ban » van 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 nghien tach - canh tranh cua thong ((cong manh) OR (cong danh)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nghien tach - canh tranh cua thong ((cong manh) OR (cong danh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc nghien tach - canh tranh cua thong ((cong manh) OR (cong danh)) toan ban*.