Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, xuc ban
nang co » nang cao, nang doc, nang noi
hanh ve » hanh vi, hanh va, hanh kem
ve cam » ve cham, ve cai, te cam
ve cac » va cac, vien cac
ve cau » ke cau, va cau, le cau
va cam » va cham, va cac, va cao

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