Perhaps you should try some spelling variations:
xa khanh » xa thanh, van khanh, dat khanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van cam » van lam, van cau, van dam
xa hanh » xa thanh, va hanh, da hanh
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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