Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lang cong » dang cong, bang cong, hang cong
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((viet thanh) OR (viet anh)) - hanh trinh va lang cong tan phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((viet thanh) OR (viet anh)) - hanh trinh va lang cong tan phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((viet thanh) OR (viet anh)) - hanh trinh va lang cong tan phan dau*.