Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
va cam » va cham, va cac, va cao
vi cua » di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (nang ma)) hoi. lieu va cam duc va hanh ((vi cua) OR (vai cua)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (nang ma)) hoi. lieu va cam duc va hanh ((vi cua) or (vai cua)) tre*.