Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
xuc va » tuc va, xac va
luc va » tuc va, loc va
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 cao hoc. hieu ve cham ((xuc va) or (((luc va) OR (duc va)))) hanh va cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang cao hoc. hieu ve cham ((xuc va) OR (((luc va) OR (duc va)))) hanh va cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang cao hoc. hieu ve cham ((xuc va) or (((luc va) OR (duc va)))) hanh va cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang cao hoc. hieu ve cham ((xuc va) or (((luc va) OR (duc va)))) hanh va cau tren*.