Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
va va » va van, va vua, va vai
thiet » thieu

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 xang xa hoi. hieu ve cac ((luc va) or (((thuc vat) or (thuc dan)))) hanh va va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang xa hoi. hieu ve cac ((luc va) OR (((thuc vat) OR (thuc dan)))) hanh va va thiet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu ve cac ((luc va) or (((thuc vat) or (thuc dan)))) hanh va va thiet*.