Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
cao suc » cao su, cao duc
sach tu » sach thu, cach tu, sach ty
qua cao » qua cac, qua ca, qua cai
nang xa » lang xa, nang ma, mang xa
suc va » duc va, tuc va, luc va
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: toc sach tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va hanh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ((nang xa) OR (nang x)) hoi. hieu qua cao suc va hanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va hanh vai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: toc sach tu ((nang xa) or (nang x)) hoi. hieu qua cao suc va hanh vai ((cua te) OR (cua tu))*.