Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((te sach) or (chieu sach)) - hanh ((mang cua) OR (dung cua)) nhung cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((te sach) OR (chieu sach)) - hanh ((mang cua) OR (dung cua)) nhung cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((te sach) or (chieu sach)) - hanh ((mang cua) OR (dung cua)) nhung cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((te sach) or (chieu sach)) - hanh ((mang cua) OR (dung cua)) nhung cong san toan cao*.