Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
luc va » duc va, tuc va, loc va
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: thu sach ky ((nang xa) or (nang ma)) hoi. ((hieu ve) or (hieu van)) cam luc va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) cam luc va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (nang ma)) hoi. ((hieu ve) or (hieu van)) cam luc va hanh vi cua vat*.