Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
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 ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
xuc ban » cuc ban, quoc ban, xuat ban
duc ban » duc tan, duc van, dua ban
hai cua » thai cua, dai cua, hoi cua

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 thi nang xa hoi. hieu ve cham ((xuc ban) or (duc ban)) thanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang xa hoi. hieu ve cham ((xuc ban) OR (duc ban)) thanh hai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi nang xa hoi. hieu ve cham ((xuc ban) or (duc ban)) thanh hai cua viet*.