Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
hoc sach » hoc sinh, hoc cac, hoc anh
va trinh » van trinh, va tinh, lap trinh
hieu van » hieu va, thien van, lieu va
so sanh » do sanh
van cua » vang cua, ban cua, dan cua
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (hoc sach)) ky nang ((x hoi) or (o hoi)). hieu van cam xuc va trinh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (hoc sach)) ky nang ((x hoi) OR (o hoi)). hieu van cam xuc va trinh van cua tre.
• Adding a wildcard symbol may retrieve word variants: ((so sanh) or (hoc sach)) ky nang ((x hoi) or (o hoi)). hieu van cam xuc va trinh van cua tre*.