Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh van » trinh han, trinh toan, dinh van
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac
san phan » san pham, van phan, sat phan
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 chieu sach - canh ((trinh va) or (((trinh van) OR (trinh quan)))) nhung cong san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh ((trinh va) OR (((trinh van) OR (trinh quan)))) nhung cong san phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - canh ((trinh va) or (((trinh van) OR (trinh quan)))) nhung cong san phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh ((trinh va) or (((trinh van) OR (trinh quan)))) nhung cong san phan cau*.