Perhaps you should try some spelling variations:
sang dai » sang tai, lang dai, sang mai
pham xuc » pham duc, pham cuc, pham xuan
hieu su » hieu sau, tieu su, hieu so
doi cua » dai cua, hoi cua
ky sang » ky nang, ky dang, ky tang
dai hoi » dai hoc, dai hai, dai moi
va hanh » van hanh, va thanh, va danh
su pham » san pham
di cua » dai cua, de cua, do cua
tu sai » tu bai, tu san, tu cai
xuc va » duc va, tuc va, luc va
te bai » te bao, te tai, te ban

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 (te bai)) ky sang dai hoi. hieu su pham xuc va hanh ((di cua) OR (doi cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (te bai)) ky sang dai hoi. hieu su pham xuc va hanh ((di cua) OR (doi cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (te bai)) ky sang dai hoi. hieu su pham xuc va hanh ((di cua) OR (doi cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (te bai)) ky sang dai hoi. hieu su pham xuc va hanh ((di cua) OR (doi cua)) te*.