Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
dang cong » dung cong
ho chieu » theo chieu, doi chieu, mot chieu
tinh van » trinh van, dinh van, tinh va
van dang » van dong, van dung, van nang
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
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: ((ho chieu) or (hoc thieu)) sach - hanh tinh van dang cong san ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh tinh van dang cong san ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) sach - hanh tinh van dang cong san ((toan cau) or (toan ban))*.