Perhaps you should try some spelling variations:
dieu cua » dieu tra
dien cua » dien cuc, dien cu, tien cua
nang dai » nang dau, nang tai, lang dai
pham xuc » pham duc, pham cuc, pham xuan
su pham » san pham
va danh » va dinh, va dan, va hanh
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, tieu su, hieu so
tu sai » tu bai, tu san, tu lai
xuc va » duc va, tuc va, luc va
tu cai » tu cac, tu can, tu bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (tu cai)) ky nang dai hoi. hieu su pham xuc va danh ((dien cua) or (dieu cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu cai)) ky nang dai hoi. hieu su pham xuc va danh ((dien cua) OR (dieu cua)) cu.
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu cai)) ky nang dai hoi. hieu su pham xuc va danh ((dien cua) or (dieu cua)) cu*.