Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van chat » cao chat
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
ve chat » va chat
va hanh » van hanh, va thanh, va danh
hanh ve » hanh vi, hanh va, hanh kem
tuc va » thuc va, truc va, tuc xa
ve cau » ke cau, va cau, ve cac

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 (van chat)) tuc va 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 chat) OR (van chat)) tuc va hanh ve cau tren".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoc. hieu ((ve chat) OR (van chat)) tuc va hanh ve cau tren*.