Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hanh di » hanh vi, hanh de, hang di
di cua » dai cua, doi cua, de cua
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ((van lam) OR (van nam)) cuu van hanh di cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x hoi. hieu ((van lam) OR (van nam)) cuu van hanh di cua cu".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu ((van lam) OR (van nam)) cuu van hanh di cua cu*.