Perhaps you should try some spelling variations:
dinh cuu » dinh chi
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
va hanh » va thanh, va danh, ban hanh
ve chat » va chat, van chat
sach ky » sac ky, sach y, sach ty
ve cham » va cham, vu cham, ve chim
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo

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 nang xa hoi. hieu ((ve cham) or (ve chat)) luc ((va hanh) OR (van hanh)) dinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((ve cham) OR (ve chat)) luc ((va hanh) OR (van hanh)) dinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((ve cham) or (ve chat)) luc ((va hanh) OR (van hanh)) dinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((ve cham) or (ve chat)) luc ((va hanh) OR (van hanh)) dinh cuu tre*.