Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban danh » ban doanh, ban hanh, ban dan
danh vi » hanh vi, dinh vi, danh di
va tham » van tham, va cham, va thanh
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cua ban danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) OR (va tham)) cua ban danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cua ban danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuat sach ((ky lang) OR (ky dang)) xa hoi. hieu ((ve cam) or (va tham)) cua ban danh vi cua tre*.