Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
dang ha » dong ha, dung ha, lang ha
sach ty » sach tu, sach thu, xach tay
ha hoi » hoa hoi, ha noi, xa 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 y) or (sach ty)) dang ha hoi. ((hieu ve) OR (hieu va)) cam cuc ban hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach y) OR (sach ty)) dang ha hoi. ((hieu ve) OR (hieu va)) cam cuc ban hanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach y) or (sach ty)) dang ha hoi. ((hieu ve) OR (hieu va)) cam cuc ban hanh dai cua tre*".