Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
cham loc » cham soc, chon loc, cham o
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang
doi qua » doi cua, hoi qua, doi quy
y nang » ky nang, ly nang, v nang
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 hang) OR (va lang)) 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 hang) OR (va lang)) 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 hang) OR (va lang)) doi qua su*.