Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang co » nang cao, nang doc, nang noi
nang ma » tang ma, sang ma, nang cao
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
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 co) or (nang ma)) hoi. hieu qua cam tuc xa hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang co) OR (nang ma)) hoi. hieu qua cam tuc xa hanh vi cua tu*.