Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
trung cua » trung tuan, trung cap, dung cua
cong dan » cong san, cong tan, huong dan
hieu ca » hieu cac, hieu cua, hieu va
dan van » dang van, doan van, dao van

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