Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
hanh doi » thanh doi, hanh noi, hang doi
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
thuc va » thuc vat, thuc day
doi cua » dai cua, hoi cua
tuc va » truc va, tuc xa, duc va
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 ty xang xa hoi. hieu va chat ((tuc va) or (((thuc va) or (thuc dan)))) hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty xang xa hoi. hieu va chat ((tuc va) OR (((thuc va) OR (thuc dan)))) hanh doi cua te.
• Adding a wildcard symbol may retrieve word variants: toc sach ty xang xa hoi. hieu va chat ((tuc va) or (((thuc va) or (thuc dan)))) hanh doi cua te*.