Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
dan dai » dat dai, can dai, dan dat
y nang » ky nang, ly nang, v nang
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va

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 y nang xa hoi. hieu va chat ((soc va) or (loc va)) dan dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va chat ((soc va) OR (loc va)) dan dai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va chat ((soc va) or (loc va)) dan dai cua viet*.