Perhaps you should try some spelling variations:
cau phuc » cau truc, chau phu, huu phuc
te sach » toc sach
va hanh » van hanh, va thanh, va danh
phuc va » phuc vu, thuc va, chuc va
hieu va » lieu va, hieu qua
tao hoi » tao khoi, tao boi, tay hoi
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
va cau » van cau, va cac, va dau
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu hoach)) ky dang ((xay hoi) or (tao hoi)). hieu va cau phuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu hoach)) ky dang ((xay hoi) OR (tao hoi)). hieu va cau phuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu hoach)) ky dang ((xay hoi) or (tao hoi)). hieu va cau phuc va hanh vi cua tre*.