Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nang ma » tang ma, sang ma, nang cao
duc van » duc tan, duc manh, duc phan
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
cua te » cua tu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ma hoi. lieu va cam ((duc van) OR (duc va)) hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ma hoi. lieu va cam ((duc van) OR (duc va)) hanh vi cua te*.