Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
dung dung » ung dung, dung ung, dung dong
dung gian » duong gian, dung giao, dung giam
gian thai » gian thanh, gian tay, gian ha
cong lan » cong luan, cong lang, cong san
lan dung » van dung, dan dung, lan hung
thai cap » thai cao, than cap, thi cap
hieu ca » hieu cac, hieu cua, hieu 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) or (hieu ca)) - thanh cong lan dung dung gian thai cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (hieu ca)) - thanh cong lan dung dung gian thai cap*.