Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van danh » van doanh, van anh, van hanh
thai cua » than cua, tai cuc, tri cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
bach lo » sach lo, bach hoa, bach mao
vai cua » dai cua, hai cua, lai cua
lo van » le van, vo van, so van

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 ky ((nang xa) or (nang x)) hoi. hieu vien bach lo van danh ((vai cua) or (thai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. hieu vien bach lo van danh ((vai cua) OR (thai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang x)) hoi. hieu vien bach lo van danh ((vai cua) or (thai cua)) tre*.