Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
lanh hanh » lanh manh, lenh hanh, xanh hanh
thanh ban » thanh san, thanh van, thanh bac
cong san » cong tac
than ban » toan ban, than man, nhuan ban
hanh va » hang va, hanh vi

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: ((hoc chieu) OR (hoc thieu)) xanh - lanh hanh va nhung cong san ((than ban) OR (thanh ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (hoc thieu)) xanh - lanh hanh va nhung cong san ((than ban) or (thanh ban))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (hoc thieu)) xanh - lanh hanh va nhung cong san ((than ban) or (thanh ban))*.