Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
van nang » van quang, van ban, van dong
va nang » da nang, cam nang, kha nang
cam duc » cam xuc, cao duc, pham duc
dan doi » dan hoi, dan toi, van doi
doi cua » dai cua, hoi cua
va cam » va cham, va cac, va cao
va dan » ca dan, va dao, va dau
cua te » cua tu
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: ((toc sach) or (hoc sach)) ((va nang) OR (van nang)) x hoi. lieu va cam duc va dan doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ((va nang) OR (van nang)) x hoi. lieu va cam duc va dan doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ((va nang) OR (van nang)) x hoi. lieu va cam duc va dan doi cua te".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ((va nang) OR (van nang)) x hoi. lieu va cam duc va dan doi cua te*.