Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
hoc hieu » hoc thieu, hoc hien, doc hieu
tung cuc » tong cuc, tung buoc, tang cuoc
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: hoc hieu manh - thanh ((tung cuc) or (((trung cua) OR (trung cap)))) phung cong tac toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh ((tung cuc) OR (((trung cua) OR (trung cap)))) phung cong tac toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh ((tung cuc) or (((trung cua) OR (trung cap)))) phung cong tac toan cao*".