Perhaps you should try some spelling variations:
dang dai » dang hai, dang bai, dang dan
phat xuc » chat xuc, phat xuat, phat huy
dieu tra » dieu tri, kiem tra, dieu cua
dien cua » dieu cua, dien cuc, dien cu
ky dang » ky nang, ky danh
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, tieu su, hieu so
phap xu » phap tu, phap thu, phap ngu
va danh » va dinh, va dan, va hanh
tu sai » tu bai, tu san, tu cai
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. hieu su ((phat xuc) or (phap xu)) va danh ((dien cua) or (dieu tra)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang dai hoi. hieu su ((phat xuc) OR (phap xu)) va danh ((dien cua) OR (dieu tra)) cu.
• Adding a wildcard symbol may retrieve word variants: tu sai ky dang dai hoi. hieu su ((phat xuc) or (phap xu)) va danh ((dien cua) or (dieu tra)) cu*.