Perhaps you should try some spelling variations:
luhoc van » luoc van, luoc va, luc van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
hoc van » hoc dan, hoc va, hoc vat
cua tre » cuu tre, cua triet, dua tren
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 ky nang xa hoi. hieu va cham ((hoc van) or (luhoc van)) hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu va cham ((hoc van) OR (luhoc van)) hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu va cham ((hoc van) or (luhoc van)) hanh vi ((cua tre) or (cua te))*.