Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
tien anh » tieng anh, tien manh, dien anh
cong van » cong vang, cong san, song van
van tan » van tuan, van ban, van tai
tan tap » toan tap, han tap, tan tat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien anh) or (hien hanh)) - hanh trinh cua nhung cong van tan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (hien hanh)) - hanh trinh cua nhung cong van tan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (hien hanh)) - hanh trinh cua nhung cong van tan tap*.