Perhaps you should try some spelling variations:
thien van » thi van
thanh vit » thanh vien, thanh vinh, hanh vi
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ca tren » cau tren, cu tren, la tren
nam tu » nam thu, nam thuc
vit ca » viet ca, viet cau
x hoi » o hoi, x ho, 5 hoi

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 ky nang ((x hoi) or (xa hoi)). thien van nam tu va thanh vit ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((x hoi) OR (xa hoi)). thien van nam tu va thanh vit ca tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((x hoi) or (xa hoi)). thien van nam tu va thanh vit ca tren*.