Perhaps you should try some spelling variations:
nang han » nang phan, nang hang, nang hanh
hanh tai » thanh tai, hang tai, han tai
han hoi » phan hoi, dan hoi, van hoi
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su dai, su mai
su hai » su tai
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) OR (su hai)) ky nang han hoi. hieu va cau luc va hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) OR (su hai)) ky nang han hoi. hieu va cau luc va hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sai) OR (su hai)) ky nang han hoi. hieu va cau luc va hanh tai cua tre*.