Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
tham duc » pham duc, tham du, than duc
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
vu nang » vuc nang, va nang, vu dang
v nang » va nang, van nang, voi nang
di cua » dai cua, doi cua, de cua
cua te » cua tu

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) OR (thuoc sach)) ((v nang) or (vu nang)) xa hoi. hieu va tham duc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ((v nang) OR (vu nang)) xa hoi. hieu va tham duc va hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ((v nang) or (vu nang)) xa hoi. hieu va tham duc va hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (thuoc sach)) ((v nang) or (vu nang)) xa hoi. hieu va tham duc va hanh di cua te*.