Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
hieu vu » hieu va, hieu ve, dieu vu
hieu su » hieu sau, tieu su, hieu so
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
te sai » te tai, te bai, te lai
sai ky » sac ky
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang x hoi. ((hieu vu) or (hieu su)) cham ((luc van) or (duc manh)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang x hoi. ((hieu vu) OR (hieu su)) cham ((luc van) OR (duc manh)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sai ky nang x hoi. ((hieu vu) or (hieu su)) cham ((luc van) or (duc manh)) hanh vi cua tre*.