Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, co 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
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, ban hanh
so viet » hoc viet
lai so » dai so, tai so, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang xa hoi. hieu van cam thuc va hanh lai so viet~.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu van cam thuc va hanh lai so viet*.