Perhaps you should try some spelling variations:
su sach » so sach
vu sach » vu bach, vu khach
tao cao » bao cao, toan cao
qua cam » qua cham, qua cac, qua ca
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
cao xa » cao va, cho xa, bao xa
anh va » hanh va
va cuu » va cau, va chu, va huu

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 (vu sach)) tao cao xa hoi. hieu qua cam ((xuc van) OR (duc van)) anh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) tao cao xa hoi. hieu qua cam ((xuc van) OR (duc van)) anh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) tao cao xa hoi. hieu qua cam ((xuc van) OR (duc van)) anh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) tao cao xa hoi. hieu qua cam ((xuc van) OR (duc van)) anh va cuu tre*.