Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
cho cua » co cua, chi cua, cho ca
va danh » va dinh, va dan, va hanh
tu sac » tu sach, tu cac, tu san
luc va » duc va, tuc va, loc va
ve cac » va cac
cua cu » cua chu, cua cau, cua su
sac ky » cac ky, sai ky
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ((x hoi) or (o hoi)). hieu ((ve cac) OR (vien cac)) luc va danh cho cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((x hoi) OR (o hoi)). hieu ((ve cac) OR (vien cac)) luc va danh cho cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((x hoi) or (o hoi)). hieu ((ve cac) OR (vien cac)) luc va danh cho cua cu".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x hoi) or (o hoi)). hieu ((ve cac) OR (vien cac)) luc va danh cho cua cu*.