Perhaps you should try some spelling variations:
dac nhan » cac nhan, danh nhan, ca nhan
day hanh » day nhanh, day thanh, dao hanh
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
nang o » nang co, nang ho, nang ro
di cuu » di cau, di cua, dinh cuu
bach y » sach y
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach y nang o hoi. hieu ((ve cac) or (ve cham)) thuc ((day hanh) or (dac nhan)) di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y nang o hoi. hieu ((ve cac) OR (ve cham)) thuc ((day hanh) OR (dac nhan)) di cuu tre.
• Adding a wildcard symbol may retrieve word variants: vu bach y nang o hoi. hieu ((ve cac) or (ve cham)) thuc ((day hanh) or (dac nhan)) di cuu tre*.