Perhaps you should try some spelling variations:
canh sinh » canh tinh, canh binh, tinh sinh
vat nhung » va nhung, vai nhung, ve nhung
vap nhung » va nhung, ve nhung, voi nhung
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
ho chieu » theo chieu, hoc thieu, doi chieu
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: ((ho chieu) or (toc thieu)) xanh - canh sinh ((vat nhung) or (vap nhung)) cong toan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) xanh - canh sinh ((vat nhung) OR (vap nhung)) cong toan phan cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) xanh - canh sinh ((vat nhung) or (vap nhung)) cong toan phan cau*.