Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cua tre » cuu tre, cua triet, dua tren
cao tuc » dao tuc, cao duc, cao suc
sach ty » sach y, sach tu, sach thu
hanh di » hanh de, hang di, danh di
tuc va » thuc va, truc va, tuc xa
va cao » va cac, va co, va dao
cua te » cua tu

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