Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
cap nuoc » dat nuoc
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
van cap » van cau, van dap, van ca
va anh » van anh, va danh, va hanh
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty ((nang xa) or (nang ma)) hoi. hieu van cap nuoc va anh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((nang xa) OR (nang ma)) hoi. hieu van cap nuoc va anh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((nang xa) or (nang ma)) hoi. hieu van cap nuoc va anh vi cua cu*.