Perhaps you should try some spelling variations:
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach, vu sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van cam » van lam, van cau, van dam
va hanh » van hanh, va thanh, va danh
doi cua » dai cua, hoi cua
xuc va » duc va, tuc va, luc va

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 y ((nang xa) OR (nang ma)) hoi. hieu ((van cam) or (van nam)) xuc va hanh doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang ma)) hoi. hieu ((van cam) OR (van nam)) xuc va hanh doi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang ma)) hoi. hieu ((van cam) or (van nam)) xuc va hanh doi cua vat".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang ma)) hoi. hieu ((van cam) or (van nam)) xuc va hanh doi cua vat*.