Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
thong dung » thong cong, thong thuong
hieu cach » hieu cac, hieu ca, biet cach
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
dung san » dong san, dung sai, dung luan
san can » san van, ban can, san chang
can cau » van cau, ban cau, ca cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu cach) or (chieu sach)) - thanh tung cua thong dung san can cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu cach) OR (chieu sach)) - thanh tung cua thong dung san can cau.
• Adding a wildcard symbol may retrieve word variants: toc ((hieu cach) or (chieu sach)) - thanh tung cua thong dung san can cau*.