Perhaps you should try some spelling variations:
dang dai » dang hai, dang bai, dang dan
phat xuc » chat xuc, phat xuat, phap xu
tieu su » thieu so
pham tu » phan tu, pham thi, pham tai
ky dang » ky nang, ky danh
dai hoi » dai hoc, dai hai, dai moi
hieu su » hieu sau, hieu so, hieu suat
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
di cua » dai cua, doi cua, de cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua su » qua su

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) or (tieu su)) ((phat xuc) or (pham tu)) va danh di cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky dang dai hoi. ((hieu su) OR (tieu su)) ((phat xuc) OR (pham tu)) va danh di cua su.
• Adding a wildcard symbol may retrieve word variants: tu sai ky dang dai hoi. ((hieu su) or (tieu su)) ((phat xuc) or (pham tu)) va danh di cua su*.