Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
duc xanh » duc anh, duc manh, duc hanh
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
lai cua » dai cua, hai cua, lai chau
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: te sach ((ty nang) or (ky nang)) x hoi. hieu van pham duc xanh hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) x hoi. hieu van pham duc xanh hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ky nang)) x hoi. hieu van pham duc xanh hanh lai cua viet*.