Perhaps you should try some spelling variations:
tang dai » tang tai, tang dan, lang dai
chat xuc » chat huu, cam xuc, chao xu
van hanh » van thanh, ban hanh, van anh
ky tang » ky nang, ky dang, kho tang
dai hoi » dai hoc, dai hai, dai moi
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hanh » va thanh, va danh, ban hanh
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky tang dai hoi. hieu va chat xuc ((va hanh) or (van hanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky tang dai hoi. hieu va chat xuc ((va hanh) OR (van hanh)) vi cua tre*.