Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
chi xanh » chi anh, chi danh, chi hanh
cong tac » cong ty
doi chi » doi khi
chai tu » cai tu, choi tu, chay tu

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 - canh trinh vat nhung cong tac ((chai tu) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh trinh vat nhung cong tac ((chai tu) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh trinh vat nhung cong tac ((chai tu) or (phan tu))*.