Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hai cua » thai cua, dai cua, hoi cua
lai cua » dai cua, lai chau, thai cua
nam soc » nam so, nam moc, nam son
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
nam lo » nam bo, nam so, nam co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. hieu ve ((nam soc) or (nam lo)) van hanh ((lai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ve ((nam soc) OR (nam lo)) van hanh ((lai cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ve ((nam soc) or (nam lo)) van hanh ((lai cua) or (hai cua)) tre*.