Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hanh trinh » canh tranh, hanh chinh
thanh tung » thanh cong
hien hanh » dieu hanh
hang cong » dang cong, hang nong, bang cong
cong van » cong vang, cong san, song van
va hang » van hang, va nang, va lang
van tan » van tuan, van ban, van tai
tan cau » toan cau, van cau, tan ca

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 nhanh) OR (hien hanh)) - ((hanh trinh) or (thanh tung)) va hang cong van tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - ((hanh trinh) OR (thanh tung)) va hang cong van tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (hien hanh)) - ((hanh trinh) or (thanh tung)) va hang cong van tan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (hien hanh)) - ((hanh trinh) or (thanh tung)) va hang cong van tan cau*.