Perhaps you should try some spelling variations:
hanh gia » danh gia, thanh gian, hinh giao
sach dao » lanh dao
sach tao » sach bao, sach tai, sach tham
dua ban » dia ban, cua ban, qua ban
gia cua » gian cua, giau cua, gia cuc
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
xuc van » duc van, luc van, vuc van
ve cam » ve cham, ve cac, va cam
y hoi » ky hoi, y hoc, o hoi

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 tao) OR (sach dao)) nganh y hoi. hieu ve cam ((xuc van) or (dua ban)) hanh gia cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tao) OR (sach dao)) nganh y hoi. hieu ve cam ((xuc van) OR (dua ban)) hanh gia cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach tao) OR (sach dao)) nganh y hoi. hieu ve cam ((xuc van) or (dua ban)) hanh gia cua tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach tao) OR (sach dao)) nganh y hoi. hieu ve cam ((xuc van) or (dua ban)) hanh gia cua tre*.