Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
truoc va » truc va, thuoc va, truong va
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
va lam » van lam, va lap
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 sai ky nang ((cao hoi) OR (cao hoc)). lieu va lam truoc va danh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((cao hoi) OR (cao hoc)). lieu va lam truoc va danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((cao hoi) OR (cao hoc)). lieu va lam truoc va danh vi cua tre*.