Perhaps you should try some spelling variations:
van khanh » van thanh, van hanh, van anh
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
khanh v » khanh van, thanh va, thanh ve
x hoi » xa hoi, o hoi, x ho
v cau » va cau, ve cau, _ cau

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 v cau 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 v cau thi.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu va) or (lieu va)) cam xuc van khanh v cau thi*.