Perhaps you should try some spelling variations:
sach vay » sach va, sach hay, sach nay
sach tay » xach tay, sach hay, sach nay
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc 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: tu ((sach tay) or (sach vay)) lang xa hoi. hieu ve cau luc va hanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tay) OR (sach vay)) lang xa hoi. hieu ve cau luc va hanh vi ((cua te) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach tay) or (sach vay)) lang xa hoi. hieu ve cau luc va hanh vi ((cua te) or (cua tu))*.