Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
tang luan » dung luan
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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