Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
nang co » nang cao, nang doc, nang noi
ve chat » va chat, van chat
vu cham » va cham, vu kham, tu cham
sach ky » sac ky, sach y, sach ty
hanh ve » hanh vi, hanh kem
hanh va » hang va, hanh vi
xuc va » duc va, tuc va, luc va

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 co hoc. hieu ((ve chat) or (vu cham)) xuc va ((hanh ve) OR (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoc. hieu ((ve chat) OR (vu cham)) xuc va ((hanh ve) OR (hanh va)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoc. hieu ((ve chat) or (vu cham)) xuc va ((hanh ve) OR (hanh va)) cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoc. hieu ((ve chat) or (vu cham)) xuc va ((hanh ve) OR (hanh va)) cau tren*.