Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
ho chieu » theo chieu, doi chieu, mot chieu
trang va » tran van
cong dan » cong san, cong tan, huong dan
dan han » dan chan, dan than, dan hanh
han tap » han tai, toan tap, nhan tai

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)) xanh - canh ((trang va) OR (hang va)) dang cong dan han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh ((trang va) OR (hang va)) dang cong dan han tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) xanh - canh ((trang va) OR (hang va)) dang cong dan han tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - canh ((trang va) OR (hang va)) dang cong dan han tap*.