Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh van » trinh han, trinh quan, trinh toan
chi xanh » chi anh, chi danh, chi hanh
trinh va » trinh vat, trinh vi, trinh han
trinh ve » trinh he, trinh vi, trinh viet
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - hanh ((((trinh va) OR (trinh van))) or (trinh ve)) nhung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - hanh ((((trinh va) OR (trinh van))) OR (trinh ve)) nhung cong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - hanh ((((trinh va) OR (trinh van))) or (trinh ve)) nhung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - hanh ((((trinh va) OR (trinh van))) or (trinh ve)) nhung cong dan than cao*.