Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
canh sinh » canh tinh, canh binh, tinh sinh
vat nhung » vap nhung, vai nhung, ve nhung
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
phan cau » phan dau, phan cac, phan tu

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 - canh sinh ((vat nhung) or (va nhung)) ((cong doan) or (cong hoan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - canh sinh ((vat nhung) OR (va nhung)) ((cong doan) OR (cong hoan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh sinh ((vat nhung) or (va nhung)) ((cong doan) or (cong hoan)) phan cau*.