Perhaps you should try some spelling variations:
hieu cac » hieu luc, hieu va, vien cac
hieu van » hieu va, thien van, lieu va
danh lai » danh sai, gianh lai, dinh lam
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, va hanh
lai cua » dai cua, hai cua, lai chau
y nang » ly nang, v nang, may nang
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: tu sach ((y nang) OR (ky nang)) xa hoi. hien ((hieu cac) or (hieu van)) nuoc va danh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ky nang)) xa hoi. hien ((hieu cac) OR (hieu van)) nuoc va danh lai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ky nang)) xa hoi. hien ((hieu cac) or (hieu van)) nuoc va danh lai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (ky nang)) xa hoi. hien ((hieu cac) or (hieu van)) nuoc va danh lai cua te*.