Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh han
nhung cong » dung cong, thong cong, hang cong
bien tinh » bi tinh, yen tinh, diep tinh
trinh cua » tinh cua, trinh luan, trinh chat
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
ho bien » pho bien, hoa bien, so bien

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

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