Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach, vu 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
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang xa hoi. hieu ve cam thuc ban hanh doi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. hieu ve cam thuc ban hanh doi cua tre*.