Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cuu nong » cuu cong, cuu nang, cuu tong
van chat » cao chat
va chat » va phat, cao chat, hoa chat
uu nang » cuu nang, vu nang, dun nang
dan dai » dat dai, can dai, dan dat
xuc va » duc va, tuc va, luc va
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 ((uu nang) OR (cuu nong)) x hoi. lieu ((va chat) or (van chat)) xuc va dan dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((uu nang) OR (cuu nong)) x hoi. lieu ((va chat) OR (van chat)) xuc va dan dai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((uu nang) OR (cuu nong)) x hoi. lieu ((va chat) or (van chat)) xuc va dan dai cua te*".