Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
bang cong » dang cong, bang song, hang cong
doc hieu » toc thieu, hoc hien
tinh cua » sinh cua, tinh chat, tranh cua
cong san » cong tac
san tan » van tan, san van, san tay
tan tap » toan tap, han tap, tan tat

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: ((doc hieu) OR (hoc thieu)) sang - hanh ((trinh cua) OR (tinh cua)) bang cong san tan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc thieu)) sang - hanh ((trinh cua) or (tinh cua)) bang cong san tan tap~".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc thieu)) sang - hanh ((trinh cua) or (tinh cua)) bang cong san tan tap*.