Perhaps you should try some spelling variations:
te sach » toc sach
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, hieu qua
hanh di » hanh de, hang di, danh di
cua tre » cua te, cuu tre, cua triet
co tuc » co thuc, co toc, do tuc

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

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