Perhaps you should try some spelling variations:
thuoc sinh » hoc sinh, thu sinh, thuoc sach
nay thuc » nam thuc, cay thuc, day thuc
hoc sach » hoc sinh, hoc cac, hoc anh
thuc day » thuc dan, thuc vat
dan vat » dang vat, van vat, dan va
dan vai » dan va, dan tai, den vai
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sinh) or (hoc sach)) ky lang xa hoi. hieu va nay thuc day ((dan vai) OR (dan vat)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sinh) OR (hoc sach)) ky lang xa hoi. hieu va nay thuc day ((dan vai) OR (dan vat)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sinh) or (hoc sach)) ky lang xa hoi. hieu va nay thuc day ((dan vai) OR (dan vat)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sinh) or (hoc sach)) ky lang xa hoi. hieu va nay thuc day ((dan vai) OR (dan vat)) cuu tre*.