Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
tang hoc » nang hoc, tang ho, bang hoc
cua tre » cua te, cuu tre, cua triet
ky tang » ky nang, ky dang, kho tang
hoc hoi » hoc khoi, hoc hoa, hoc noi
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
xuc ban » duc ban, cuc ban, quoc ban
ve cua » le cua, de cua, te cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky

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 tang hoc hoi. ((hieu ve) or (lieu va)) cam ((xuc ban) or (duc manh)) hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky tang hoc hoi. ((hieu ve) OR (lieu va)) cam ((xuc ban) OR (duc manh)) hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky tang hoc hoi. ((hieu ve) or (lieu va)) cam ((xuc ban) or (duc manh)) hanh ve cua tre*.