Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tinh day » tinh da, tinh dau, tinh dak
cham tuc » nham thuc, pham thuc, tham thuc
thi van » thi lan, thi hanh, thi nang
day cuu » day cua, day chu, day cuon
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa

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 ty ((nang xa) or (lang xa)) hoi. ((thien van) or (thi van)) cham tuc va tinh day cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty ((nang xa) OR (lang xa)) hoi. ((thien van) OR (thi van)) cham tuc va tinh day cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty ((nang xa) or (lang xa)) hoi. ((thien van) or (thi van)) cham tuc va tinh day cuu tre*.