Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, lieu tinh
thien tinh » khien tinh, thien minh, tien tinh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 ((thieu tinh) OR (thien tinh)) - canh trinh luan chung cong san ((toan tai) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (thien tinh)) - canh trinh luan chung cong san ((toan tai) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (thien tinh)) - canh trinh luan chung cong san ((toan tai) or (toan ban))*.