Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cuu » vi luu, vinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y ((nang ma) OR (tang ma)) hoi. hieu ve ((cac xuc) OR (cac nuoc)) va dan vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y ((nang ma) or (tang ma)) hoi. hieu ve ((cac xuc) OR (cac nuoc)) va dan vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach y ((nang ma) or (tang ma)) hoi. hieu ve ((cac xuc) OR (cac nuoc)) va dan vi cuu tre*.