Perhaps you should try some spelling variations:
bach quoc » bach tuoc, quach quoc, anh quoc
hieu vien » hieu hien, hieu viec, thieu nien
ban hang » ngan hang
quoc ban » quoc bao, quoc lan, quoc quan
hai cua » thai cua, dai cua, hoi cua
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vi cua » vai cua, di cua

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 xa) or (nang ma)) hoi. hieu vien bach quoc ban hang ((vi cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. hieu vien bach quoc ban hang ((vi cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang ma)) hoi. hieu vien bach quoc ban hang ((vi cua) or (hai cua)) tre*.