Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trinh thi » trinh tai, dinh thi, trinh tin
bang cong » dang cong, bang song, hang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
trinh tu » trinh ky, trinh do
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan 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 hieu nganh - hanh ((trinh va) or (((trinh thi) OR (trinh tu)))) bang cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh ((trinh va) OR (((trinh thi) OR (trinh tu)))) bang cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh ((trinh va) or (((trinh thi) OR (trinh tu)))) bang cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh ((trinh va) or (((trinh thi) OR (trinh tu)))) bang cong san toan tap*.