Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc ban » duc van, dua ban, duc man
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu va cham ((duc ban) or (duc tan)) thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu va cham ((duc ban) OR (duc tan)) thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu va cham ((duc ban) or (duc tan)) thanh di cua tre*.