Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc cua » hoc cua, thuc va
dang xa » dang xay, lang xa, dang ha
sach ky » sac ky, sach y, sach ty
thuc ca » thuc can, thuc cao, thuc va
ky dang » ky nang, ky danh
dan vai » dan va, dan tai, dan vat
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky dang xa hoi. ((lieu va) or (hieu qua)) nam ((thuc ca) or (thuc cua)) dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky dang xa hoi. ((lieu va) OR (hieu qua)) nam ((thuc ca) OR (thuc cua)) dan vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky dang xa hoi. ((lieu va) or (hieu qua)) nam ((thuc ca) or (thuc cua)) dan vai cuu tre*.