Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
luoc can » hoc can, luoc dai, duoc cac
luu tre » luu tru, cuu tre, luy tre
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
vi luu » vi lua
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky sang ma hoi. hieu ve cac ((duc manh) or (((luoc can) or (luc canh)))) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky sang ma hoi. hieu ve cac ((duc manh) OR (((luoc can) OR (luc canh)))) hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky sang ma hoi. hieu ve cac ((duc manh) or (((luoc can) or (luc canh)))) hanh vi luu tre*.