Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
tran van » luan van
cong tan » cong tac, cong san, cong thanh
tan van » tang van, luan van, dang van

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

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