Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thuat chan » thuat toan, thuat san
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
cong qua » cong cua, song qua, cong quy
qua dung » quang dung, su dung, qua song
chat ran » chat ban, chat va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - thanh cong qua dung cong lang ((chat ran) or (thuat chan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh cong qua dung cong lang ((chat ran) OR (thuat chan))*.