Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
van chat » cao chat
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach ty
va dinh » van dinh, va kinh, va tinh
nang xa » nang x, lang xa, mang xa
dai cuu » dai huu
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: thu sach ky ((nang xa) or (nang ma)) hoi. hieu van chat xuc va dinh ((dai cuu) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (nang ma)) hoi. hieu van chat xuc va dinh ((dai cuu) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang xa) or (nang ma)) hoi. hieu van chat xuc va dinh ((dai cuu) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang xa) or (nang ma)) hoi. hieu van chat xuc va dinh ((dai cuu) OR (dai cua)) tre*.