Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
canh sinh » canh tinh, canh binh, tinh sinh
bang cong » dang cong, bang song, hang cong
ho chieu » theo chieu, doi chieu, mot chieu
vat bang » mat bang, va bang, van bang
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan lap

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 (hoc thieu)) xanh - canh sinh vat bang cong dan ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh sinh vat bang cong dan ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - canh sinh vat bang cong dan ((phan cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - canh sinh vat bang cong dan ((phan cau) or (phan tu))*.