Perhaps you should try some spelling variations:
su sach » so sach, vu sach
xanh di » vanh dai, xanh tai
danh di » danh du, danh dien, danh gia
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
ha hoi » hoa hoi, ha noi, xa hoi
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sanh)) ky lang ha hoi. hieu va cam luc va ((danh di) OR (xanh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky lang ha hoi. hieu va cam luc va ((danh di) OR (xanh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) ky lang ha hoi. hieu va cam luc va ((danh di) OR (xanh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky lang ha hoi. hieu va cam luc va ((danh di) OR (xanh di)) cua tre*.