Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
doan quan » doan quang, toan quan, doan tuan
dan quan » van quan, ban quan, dan luan
cong tan » cong tac, cong san, cong thanh
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: hoc chieu tinh - hanh ((doan quan) OR (dan quan)) nhung cong tan ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu tinh - hanh ((doan quan) OR (dan quan)) nhung cong tan ((toan ban) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu tinh - hanh ((doan quan) OR (dan quan)) nhung cong tan ((toan ban) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu tinh - hanh ((doan quan) OR (dan quan)) nhung cong tan ((toan ban) or (toan tap))*.