Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cua viet » ca viet, hoa viet, cua vat
thi nang » thi cong, ki nang, thi hanh
xuc ban » cuc ban, quoc ban, xuat ban
hai cua » thai cua, dai cua, hoi cua
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam

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) OR (te sach)) thi nang xa hoi. hieu ve cam ((xuc ban) or (duc ban)) thanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thi nang xa hoi. hieu ve cam ((xuc ban) OR (duc ban)) thanh hai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) thi nang xa hoi. hieu ve cam ((xuc ban) or (duc ban)) thanh hai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) thi nang xa hoi. hieu ve cam ((xuc ban) or (duc ban)) thanh hai cua viet*.