Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
cong quang » luong quang, thong quang, duong quang
quang phan » quang chan, quang phat, quang thanh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
phan lap » phan dau

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 ((trung tuan) or (tran quang)) dung cong quang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung tuan) OR (tran quang)) dung cong quang phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung tuan) or (tran quang)) dung cong quang phan lap*.