Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van ban
dieu cua » dieu tra
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat, va tham
van anh » van thanh, tuan anh, van minh
de cua » le cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. lieu va cham duc ((van hanh) or (van anh)) ((de cua) OR (dieu cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. lieu va cham duc ((van hanh) OR (van anh)) ((de cua) OR (dieu cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. lieu va cham duc ((van hanh) or (van anh)) ((de cua) OR (dieu cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. lieu va cham duc ((van hanh) or (van anh)) ((de cua) OR (dieu cua)) tre*.