Perhaps you should try some spelling variations:
qua chat » qua nhat, qua cham, luan chat
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
duc van » duc va, duc tan, duc phan
cua tre » cua te, cuu tre, cua triet
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 xa) or (lang xa)) hoi. hieu qua chat ((duc van) OR (duc manh)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (lang xa)) hoi. hieu qua chat ((duc van) OR (duc manh)) hanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (lang xa)) hoi. hieu qua chat ((duc van) OR (duc manh)) hanh vi cua tre*".