Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » tu sach, thuat sach, thu hoach
va cham » va chat, va tham
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
vi cua » vai cua, di cua
tuc va » thuc va, truc va, tuc xa
cua te » cua tu
va cai » va cac, va bai, va dai
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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) OR (thuoc sach)) y nang x hoi. hieu ((va cai) or (va cham)) tuc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cai) OR (va cham)) tuc va danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cai) or (va cham)) tuc va danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuoc sach)) y nang x hoi. hieu ((va cai) or (va cham)) tuc va danh vi cua te*.