Perhaps you should try some spelling variations:
dang xay » dang van, van xay
danh vai » danh sai, danh va, doanh van
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cau tuc » cau truc, cau tu, cau luc
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
va cau » van cau, va cac, va dau
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((nang xa) or (dang xay)) hoi. lieu va cau tuc va danh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (dang xay)) hoi. lieu va cau tuc va danh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) or (dang xay)) hoi. lieu va cau tuc va danh vai cua viet*.