Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach ty, sach kem
vai cua » dai cua, hai cua, lai cua
cao duc » dao duc, cao suc, giao duc
cam duc » cam xuc, pham duc, nam duoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) OR (sach y)) nang xa hoi. hieu ve ((cam duc) or (cao duc)) van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sach y)) nang xa hoi. hieu ve ((cam duc) OR (cao duc)) van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sach y)) nang xa hoi. hieu ve ((cam duc) or (cao duc)) van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sach y)) nang xa hoi. hieu ve ((cam duc) or (cao duc)) van hanh vai cua te*.