Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
pham thu » pham thuc, pham thi, pham tu
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty lang xa hoi. hieu ve ((pham thu) or (nham thuc)) va hanh va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty lang xa hoi. hieu ve ((pham thu) OR (nham thuc)) va hanh va cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. hieu ve ((pham thu) or (nham thuc)) va hanh va cua viet*.