Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
xach tay » canh tay
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va trinh » van trinh, va tinh, lap trinh
trinh ve » trinh he, trinh va, trinh vi
van cac » van hac, van cau, van bac
ang xa » lang xa, mang xa, dang xay
ve cua » le cua, de cua, te 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 thu) or (xach tay))) or (sach y)) ang xa hoi. hieu van cac nuoc va trinh ve cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach thu) OR (xach tay))) OR (sach y)) ang xa hoi. hieu van cac nuoc va trinh ve cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach thu) or (xach tay))) or (sach y)) ang xa hoi. hieu van cac nuoc va trinh ve cua tu*.