Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
te sach » toc sach
duc van » duc va, duc tan, duc manh
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
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 sach ky ((nang ma) OR (tang ma)) hoi. hieu ve cam ((duc van) or (luoc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (tang ma)) hoi. hieu ve cam ((duc van) OR (luoc van)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) OR (tang ma)) hoi. hieu ve cam ((duc van) or (luoc van)) hanh vi cua tre*".