Perhaps you should try some spelling variations:
nang noi » nang doc
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
qua cac » cua cac
cac tuc » cac toc, cac tu, cac tac
xa hanh » xa thanh, xa khanh, va hanh
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang noi) or (tang ma)) hoi. hieu qua cac tuc xa hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang noi) OR (tang ma)) hoi. hieu qua cac tuc xa hanh vi cua tu*.