Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
nhan thong » nhan trong, nha thong, nhan khong
thong cong » trong cong, tong cong, thong thong
cong luong » cong thuong, nang luong, cong dong
luong van » luong va, duong van, luong vat
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) OR (doc hieu)) manh - ((hanh trinh) or (canh tranh)) nhan thong cong luong van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - ((hanh trinh) OR (canh tranh)) nhan thong cong luong van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) manh - ((hanh trinh) or (canh tranh)) nhan thong cong luong van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (doc hieu)) manh - ((hanh trinh) or (canh tranh)) nhan thong cong luong van ban*.