Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
nang doc » nang luc
doc hoc » duoc hoc, toc hoc, duc hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
xuc va » duc va, luc va, xac va
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
tuc va » thuc va, truc va, tuc xa
va cau » van cau, va cac, va dau

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 y nang doc hoc. hieu ve cham ((xuc va) or (((loc va) or (tuc va)))) hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang doc hoc. hieu ve cham ((xuc va) OR (((loc va) OR (tuc va)))) hanh va cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach y nang doc hoc. hieu ve cham ((xuc va) or (((loc va) or (tuc va)))) hanh va cau tren*.