Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
sang tao » hang tai
tu sach » su sach, te sach, tu cach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, cua triet
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
va cua » va chua, via cua, ca 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: ((tu sach) OR (thu sach)) ky sang tao hoi. hieu ((ve cam) or (vu cham)) xuc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky sang tao hoi. hieu ((ve cam) OR (vu cham)) xuc va hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky sang tao hoi. hieu ((ve cam) or (vu cham)) xuc va hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky sang tao hoi. hieu ((ve cam) or (vu cham)) xuc va hanh va cua tre*.