Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va tinh » may tinh
tinh ca » tinh cao, tinh cua, tinh va
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
ca cua » co cua
cua te » cua tu

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 ky nang x ho. hieu ((ve cai) or (va cam)) duc va tinh ca cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x ho. hieu ((ve cai) OR (va cam)) duc va tinh ca cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x ho. hieu ((ve cai) or (va cam)) duc va tinh ca cua te*.