Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, hieu ca, biet cach
cua nhung » va nhung
cong sang » cong san, cong lang, cong vang
sang phan » sang than, nang phan, san phan
tung cua » trung cua, tuong cua, dung cua
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) or (hieu cach)) - thanh tung cua nhung cong sang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (hieu cach)) - thanh tung cua nhung cong sang phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (hieu cach)) - thanh tung cua nhung cong sang phan cau*.