Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
cong luan » tong luan, cong tuan, dong luan
luan phan » luan van, luan hoan
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: doi ((chieu sach) OR (chiet tach)) - canh ((trinh vat) or (trinh van)) hang cong luan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chiet tach)) - canh ((trinh vat) OR (trinh van)) hang cong luan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chiet tach)) - canh ((trinh vat) or (trinh van)) hang cong luan phan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chiet tach)) - canh ((trinh vat) or (trinh van)) hang cong luan phan cau*.