Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu lang » chieu sang, hieu quang, nhieu tang
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

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