Perhaps you should try some spelling variations:
toan cau » toan cao, toan ban, toan tap
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van hau » van ha, van hai, van dau
xuc van » duc van, luc van, vuc van
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((toan cau) OR (van hau)) xuc van hanh tai ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((toan cau) or (van hau)) xuc van hanh tai ((cua te) OR (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((toan cau) or (van hau)) xuc van hanh tai ((cua te) OR (cua tu))*.