Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chua » tranh cua, trinh chuan, tranh chap
chua dung » chua dong, thuat dung, chua nhung
dung cong » dung trong
so thiet » soc thiet, hoc thiet, hoa thiet
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan 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 hien) or (so thiet)) tach - hanh tranh chua dung cong tan tran ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (so thiet)) tach - hanh tranh chua dung cong tan tran ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (so thiet)) tach - hanh tranh chua dung cong tan tran ban*.