Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
kha dung » khoa dung, khao dung, nha dung
ha dung » hai dung, nha dung, ha dong
tan cao » toan cao, tay cao, tan ca
tao cao » bao cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - thanh cong ((ha dung) or (kha dung)) cong vang ((tan cao) or (tao cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh cong ((ha dung) OR (kha dung)) cong vang ((tan cao) OR (tao cao)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh cong ((ha dung) or (kha dung)) cong vang ((tan cao) or (tao cao))*.