Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc phan
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

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 lang xa hoi. hieu vu cham ((luc van) or (((duc van) OR (duc manh)))) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. hieu vu cham ((luc van) OR (((duc van) OR (duc manh)))) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky lang xa hoi. hieu vu cham ((luc van) or (((duc van) OR (duc manh)))) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. hieu vu cham ((luc van) or (((duc van) OR (duc manh)))) hanh vi cua tre*.