Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, nhung don
lieu tinh » trieu tinh, diep tinh, bien tinh
hang cong » dang cong, hang nong, bang cong
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
ho lieu » so lieu, co lieu, ho kieu

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: ho lieu tinh - hanh trinh luan ((nhung cong) OR (hang cong)) manh ((toan cau) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - hanh trinh luan ((nhung cong) or (hang cong)) manh ((toan cau) or (toan tap))*.