Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nam xuc » cam xuc, nam xua, nam thuc
xuc ban » duc ban, cuc ban, quoc ban
ban ban » ban banh, van ban, can ban
cua tre » cua te, cuu tre, cua triet
ban vi » ban voi, ban va, ban ve
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu van nam xuc ban ban vi ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van nam xuc ban ban vi ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van nam xuc ban ban vi ((cua tre) or (cua tu))*.