Perhaps you should try some spelling variations:
viec bach » vien bach, viec ban, viec bao
bach tuoc » sach duoc, sach nuoc
hieu viec » nhieu viec, hieu ve, sieu viet
hai cua » thai cua, dai cua, hoi cua
sai cua » dai cua, lai cua, bai cua
va danh » va dinh, va dan, va hanh
tuoc va » thuoc va, nuoc va, duoc va
tu sach » thu sach, te sach, tu cach
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach

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) or (su sach)) ky nang cao hoi. hieu viec bach tuoc va danh ((sai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang cao hoi. hieu viec bach tuoc va danh ((sai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang cao hoi. hieu viec bach tuoc va danh ((sai cua) OR (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang cao hoi. hieu viec bach tuoc va danh ((sai cua) OR (hai cua)) tre*.