Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
thuc nhung » phuc nhung, thu nhung, thuc chung
cong thanh » dong thanh, cong trinh, cong tan
toan thuc » toan hoc, dan thuc, nhan thuc
cong than » cong thang, cong tan, cong thai
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien nhanh - tinh toan thuc nhung ((cong than) or (cong thanh)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - tinh toan thuc nhung ((cong than) OR (cong thanh)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - tinh toan thuc nhung ((cong than) or (cong thanh)) phan cac*.