Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
cua nhung » va nhung
canh ban » can ban, canh van, doanh ban
canh dan » canh van, sanh dan, thanh dan
san tap » han tap, man tap, san tay

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 (thien hach)) - ((canh ban) or (canh dan)) cua nhung cong thanh san tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (thien hach)) - ((canh ban) OR (canh dan)) cua nhung cong thanh san tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (thien hach)) - ((canh ban) or (canh dan)) cua nhung cong thanh san tap*.