Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
doc hieu » toc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cua dang » cua cong, cua ban
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan 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) or (doc hieu)) xanh - anh tang cua dang cong san ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doc hieu)) xanh - anh tang cua dang cong san ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (doc hieu)) xanh - anh tang cua dang cong san ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doc hieu)) xanh - anh tang cua dang cong san ((toan cau) OR (toan tap))*.