Perhaps you should try some spelling variations:
thi cham » thi hai, toc cham, thi ha
cuu tre » cua tre, cau tren, cau treo
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
ve cham » va cham, ve chat, vu cham
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
ha hoi » hoa hoi, ha noi, xa hoi
tu bai » tu ban, tu bat, te bai
vi cuu » vi luu, vinh cuu
tu sai » tu san, tu cai, tu lai

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 (tu bai)) ky lang ha hoi. hieu ((ve cham) or (thi cham)) hoc va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu bai)) ky lang ha hoi. hieu ((ve cham) OR (thi cham)) hoc va danh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) OR (tu bai)) ky lang ha hoi. hieu ((ve cham) or (thi cham)) hoc va danh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) OR (tu bai)) ky lang ha hoi. hieu ((ve cham) or (thi cham)) hoc va danh vi cuu tre*.