Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
thu sach » tu sach, thuat sach, thuoc sach
hanh tai » thanh tai, hang tai, han tai
dua tren » dung tren
suc xanh » suc manh, suc canh, tuoc xanh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
sach ky » sac ky, sach y, sach ty
ve cac » va cac, vien cac
ve cao » va cao, ve bao, ve co
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky dang xa hoi. hieu ((ve cao) or (ve cac)) suc xanh hanh tai ((dua tren) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky dang xa hoi. hieu ((ve cao) OR (ve cac)) suc xanh hanh tai ((dua tren) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: thu sach ky dang xa hoi. hieu ((ve cao) or (ve cac)) suc xanh hanh tai ((dua tren) or (cua cu))*.