Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
huong doi » huong dan, trong doi, dung doi
va huong » va thuong, va phuong, va tuong
hieu ve » hieu va, hieu van
doi qua » doi cua, hoi qua, doi quy
y nang » ky nang, ly nang, v nang
cam lo » nam lo, cam ly
x hoi » xa hoi, o hoi, 5 hoi
cam o » cham o, ca o, tam o

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 sach y nang ((x hoi) OR (x ho)). hieu ve ((cam lo) OR (cam o)) va huong doi qua su~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ((x hoi) or (x ho)). hieu ve ((cam lo) OR (cam o)) va huong doi qua su~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ((x hoi) or (x ho)). hieu ve ((cam lo) OR (cam o)) va huong doi qua su*.