Perhaps you should try some spelling variations:
van khanh » van thanh, van hanh, van anh
khanh ve » hanh ve, thanh ve, khanh v
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
xuc van » duc van, luc van, vuc van
cac thi » cac thoi, cau thi, can thi
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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. ((hieu va) or (lieu va)) cam xuc van khanh ve cac thi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu va) OR (lieu va)) cam xuc van khanh ve cac thi.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu va) or (lieu va)) cam xuc van khanh ve cac thi*.