Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
chan tu » phan tu, han tu, chon tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (hoc thieu)) xanh - canh trinh va nhung ((cong tan) OR (cong tac)) chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc thieu)) xanh - canh trinh va nhung ((cong tan) OR (cong tac)) chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (hoc thieu)) xanh - canh trinh va nhung ((cong tan) OR (cong tac)) chan tu".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc thieu)) xanh - canh trinh va nhung ((cong tan) OR (cong tac)) chan tu*.