Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
anh vi » hanh vi, anh va, anh ve
vi cuu » vi luu, vinh cuu

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 xa) or (lang xa)) hoi. hieu qua cam ((xuc van) or (duc van)) anh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. hieu qua cam ((xuc van) OR (duc van)) anh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang xa)) hoi. hieu qua cam ((xuc van) or (duc van)) anh vi cuu tre*.