Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
tan thanh » tran thanh, tang thanh, toan thanh
dung cong » dung trong
tran chau » tranh chap, tran huu
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tran cau » toan cau, ran cau, tra cau
hoc tan » hoc tang, hoc dan, hoc tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tan thanh - ((hanh tranh) or (canh tranh)) cua dung cong tan ((tran cau) OR (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tan thanh - ((hanh tranh) OR (canh tranh)) cua dung cong tan ((tran cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tan thanh - ((hanh tranh) or (canh tranh)) cua dung cong tan ((tran cau) OR (tran chau))".
• Adding a wildcard symbol may retrieve word variants: hoc tan thanh - ((hanh tranh) or (canh tranh)) cua dung cong tan ((tran cau) OR (tran chau))*.