Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
hien xanh » hien hanh, hien nhanh, chieu xanh
dung cong » dung trong
trinh va » trinh van, trinh vat, trinh ve
chan ban » chat ban, chan nan, chan doan
can ban » van ban, toan ban

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 xanh - hanh trinh va ((nhung cong) or (dung cong)) dan ((chan ban) OR (can ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh va ((nhung cong) OR (dung cong)) dan ((chan ban) OR (can ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - hanh trinh va ((nhung cong) or (dung cong)) dan ((chan ban) OR (can ban))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh va ((nhung cong) or (dung cong)) dan ((chan ban) OR (can ban))*.