Perhaps you should try some spelling variations:
hang khoa » dung khoa
duc manh » suc manh, duc anh, duc minh
khoa hoi » khoan hoi, khoa hoc, khoa doi
ky hang » ky nang, ly hang, ky dang
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
cuc ban » cua ban, cac ban, cuu ban
tu sai » tu bai, tu san, tu cai
ve cua » le cua, de cua, te cua
sai ky » sac ky
cua te » cua tu

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