Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
thuc dan » thuc hanh, hoc dan, thuc vat
dan hang » ban hang, van hang, dat hang
hang tai » hang va, dung tai
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tai cuu » tai cuc, tai buu, tai cua
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((hieu ve) OR (hieu qua)) cau thuc dan hang tai cuu tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. ((hieu ve) or (hieu qua)) cau thuc dan hang tai cuu tre*.