Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
nhung cong » dung cong, thong cong, hang cong
cong ngang » cong nhan, cong quang, cong lang
ngang toan » nganh toan, dang toan, quang toan
chua nang » chuc nang, chua xang, cuu nang
kha nang » phap nang, ky nang, ki nang
trinh va » trinh van, trinh vat, trinh ve
toan cau » toan cao, toan ban, toan tap

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

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