Perhaps you should try some spelling variations:
bach tuoc » sach duoc, sach nuoc
vu sach » su sach, vu khach
hieu ve » hieu va, hieu van
ve bach » ve cach, vi bach, vien bach
tuoc va » thuoc va, nuoc va, duoc va
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, lai cua
hoi cua » hoi chuc
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (vu bach)) ky nang x hoi. hieu ve bach tuoc va hanh ((hai cua) or (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu bach)) ky nang x hoi. hieu ve bach tuoc va hanh ((hai cua) OR (hoi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (vu bach)) ky nang x hoi. hieu ve bach tuoc va hanh ((hai cua) or (hoi cua)) tre*".