Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
cau treo » cau theo, cau tren, cau triet
sach ky » sac ky, sach y, sach ty
lang xa » dang xay, lang van
lang ha » long ha
thuc va » thuc vat, thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
vai cau » va cau, van cau, vai cac
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky ((lang xa) or (lang ha)) hoi. hieu van nam thuc va dan vai cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky ((lang xa) OR (lang ha)) hoi. hieu van nam thuc va dan vai cau treo.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky ((lang xa) or (lang ha)) hoi. hieu van nam thuc va dan vai cau treo*.