Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
hanh doi » thanh doi, hanh noi, hang doi
tu sach » thu sach, su sach, te sach
nam cuu » nam cua, nam suu, nam cau
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
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: tu sach y nang x hoi. hieu van nam cuu van hanh doi cua cu~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van nam cuu van hanh doi cua cu*.