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

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 duc van ((anh va) OR (hanh 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 duc van ((anh va) OR (hanh 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 duc van ((anh va) OR (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) tao cao xa hoi. hieu qua cam duc van ((anh va) OR (hanh va)) cuu tre*.