Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hang doi » hang di, hang loi, huong doi
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
doi qua » doi cua, hoi qua, doi quy
y nang » ky nang, ly nang, v nang
loc va » hoc va
luc va » duc va, tuc va
san y » dan y, san _
x hoi » xa hoi, o hoi, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san y nang ((x hoi) OR (x ho)). hieu ve cham ((loc va) OR (luc va)) hang doi qua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san y nang ((x hoi) or (x ho)). hieu ve cham ((loc va) OR (luc va)) hang doi qua su~".
• Adding a wildcard symbol may retrieve word variants: thuat san y nang ((x hoi) or (x ho)). hieu ve cham ((loc va) OR (luc va)) hang doi qua su*.