Perhaps you should try some spelling variations:
may trinh » may tinh, lap trinh, quy trinh
thien van » thi van
trinh voi » trinh hoi, trinh vi, trinh boi
lam truc » lam truoc, nam truc, lam thuoc
truc may » tren may, truc 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
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
voi cua » hoi cua, doi cua, moi cua
cua tre » cua te, cuu tre, cua triet

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 xa hoi. ((hieu ve) or (thien van)) lam truc may trinh voi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((hieu ve) OR (thien van)) lam truc may trinh voi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. ((hieu ve) or (thien van)) lam truc may trinh voi cua tre*.