Perhaps you should try some spelling variations:
dieu cua » dieu tra
dien cua » dien cuc, dien cu, tien cua
phat xuc » chat xuc, phat xuat, phap xu
hieu su » hieu sau, tieu su, hieu so
va danh » va dinh, va dan, va hanh
ky dang » ky nang, ky danh
dai hoi » dai hoc, dai moi
dai hai » dai han, dai tai, dai thao
su phat » su pham, tu phat, xu phat
tu sai » tu bai, tu san, tu cai
xuc va » duc va, tuc va, luc va
sai ky » sac ky

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 ky dang ((dai hoi) or (dai hai)). hieu su phat xuc va danh ((dien cua) OR (dieu cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang ((dai hoi) OR (dai hai)). hieu su phat xuc va danh ((dien cua) OR (dieu cua)) cu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky dang ((dai hoi) or (dai hai)). hieu su phat xuc va danh ((dien cua) OR (dieu cua)) cu*".