Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
va hanh » van hanh, va thanh, va danh
ro hoi » co hoi, o hoi, mo hoi
vi cau » va cau, ve cau, di cau

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: thu sach ky nang ro hoi. hieu van ((cam xuc) OR (cham soc)) va hanh vi cau tren~.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ro hoi. hieu van ((cam xuc) or (cham soc)) va hanh vi cau tren*.