Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
kieu tinh » lieu tinh, trieu tinh, diep tinh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
ho kieu » ho lieu, so kieu, thi kieu

You may be able to get more results by adjusting your search query.

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