Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lam quoc » lam duoc, nam quoc, lam thuoc
te sach » toc sach
lang xa » lang ha, dang xay, lang van
bo benh » so benh, ba benh, co benh
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
va lam » van lam, va lap
o benh » so benh, hoc benh, soc benh
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (hoc sach)) y lang xa hoi. lieu va lam quoc ((bo benh) or (o benh)) ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) y lang xa hoi. lieu va lam quoc ((bo benh) OR (o benh)) ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) y lang xa hoi. lieu va lam quoc ((bo benh) or (o benh)) ve cua tre*.