Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thuat chan » thuat toan, thuat san
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
chat ran » chat ban, chat va
cong su » cong suc, cong sua, cong cu

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 - thanh cong su dung cong vang ((chat ran) or (thuat chan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - thanh cong su dung cong vang ((chat ran) OR (thuat chan)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - thanh cong su dung cong vang ((chat ran) or (thuat chan))*.