Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
hanh tai » thanh tai, hang tai, han tai
dang dan » dang dang, dang van, dung dan
hieu va » lieu va, hieu qua
tai cua » thai cua, tai cuc, tri cua
ky dang » ky nang, ky danh
dan hoi » dan hoc, dai hoi, van hoi
duc van » duc va, duc tan, duc manh
va chat » van chat, va phat, cao chat
tu sai » tu san, tu cai, tu lai
tu bai » tu ban, tu bat, te bai
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky dang dan hoi. hieu va chat ((thuc van) OR (duc van)) hanh tai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu bai)) ky dang dan hoi. hieu va chat ((thuc van) or (duc van)) hanh tai cua te~".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu bai)) ky dang dan hoi. hieu va chat ((thuc van) or (duc van)) hanh tai cua te*.