Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thong dung » thong cong, thong thuong
hoc chiet » hoc thiet, hoc hien, hoc viet
hoc nhiet » hoc thiet, hoc nghien, hoc hien
tranh cua » doanh cua, manh cua
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 chiet) OR (hoc nhiet)) tach - hanh tranh cua ((thong dung) or (ung dung)) van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc nhiet)) tach - hanh tranh cua ((thong dung) OR (ung dung)) van tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chiet) OR (hoc nhiet)) tach - hanh tranh cua ((thong dung) or (ung dung)) van tuan ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chiet) OR (hoc nhiet)) tach - hanh tranh cua ((thong dung) or (ung dung)) van tuan ban*.