Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang bai » dung bai, dang hai, dang ba
bai khoi » bai choi, mai khoi, tai khoi
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
va hanh » va thanh, va danh, ban hanh
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
ky dang » ky nang, ky danh
ca tren » cau tren, cu tren, la tren

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 ky dang bai khoi. lieu va cham xuc ((va hanh) OR (van hanh)) tai ((cuu tre) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang bai khoi. lieu va cham xuc ((va hanh) OR (van hanh)) tai ((cuu tre) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang bai khoi. lieu va cham xuc ((va hanh) OR (van hanh)) tai ((cuu tre) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang bai khoi. lieu va cham xuc ((va hanh) OR (van hanh)) tai ((cuu tre) or (ca tren))*.