Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
hanh va » hang va
cua tre » cua te, cuu tre, cua triet
co duc » co duoc, cao duc, do duc

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

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