Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nang doc » nang luc
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
doc hoc » duoc hoc, toc hoc, duc hoc
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang doc hoc. hieu ((ve cham) or (vu cham)) xuc va hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang doc hoc. hieu ((ve cham) OR (vu cham)) xuc va hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang doc hoc. hieu ((ve cham) or (vu cham)) xuc va hanh vi cau tren*.