Perhaps you should try some spelling variations:
sach nay » sach vay, sach nang, sach ngan
van hanh » van thanh, ban hanh, van anh
sach hay » sach han, sach ha, sach vay
cau luc » cau phuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 nay) or (sach hay)) lang xa hoi. hieu ve ((cau luc) or (cau truc)) van hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach nay) OR (sach hay)) lang xa hoi. hieu ve ((cau luc) OR (cau truc)) van hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sach nay) or (sach hay)) lang xa hoi. hieu ve ((cau luc) or (cau truc)) van hanh vi cua tu*.