Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
chung cong » nhung cong, chong cong, chung thong
phung cong » nhung cong, phong cong, nhung chong
hoc thieu » toc thieu, hoc hien
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tinh - canh trinh luan ((chung cong) OR (phung cong)) dan ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - canh trinh luan ((chung cong) OR (phung cong)) dan ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tinh - canh trinh luan ((chung cong) OR (phung cong)) dan ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh trinh luan ((chung cong) OR (phung cong)) dan ((toan tai) or (toan ban))*.