Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
nhung cong » dung cong, thong cong, hang cong
lanh sinh » lanh dinh, tinh sinh, dang sinh
vat nhung » va nhung, vap nhung, vai nhung
cong tan » cong tac, cong san, cong thanh
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: doi ((chieu sach) or (chieu sang)) - lanh sinh vat nhung cong tan ((phan cau) OR (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - lanh sinh vat nhung cong tan ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu sang)) - lanh sinh vat nhung cong tan ((phan cau) OR (phan tu))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu sang)) - lanh sinh vat nhung cong tan ((phan cau) OR (phan tu))*.