Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
ban hanh » ban hang
dang hoa » dang hoai, dang khoa, dong hoa
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
ve cham » va cham, ve chat, vu cham
hoa hoi » khoa hoi, hoa hoc, hoa doi
sac ky » cac ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (sai ky)) dang hoa hoi. hieu ((va cam) or (ve cham)) duc ban hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (sai ky)) dang hoa hoi. hieu ((va cam) OR (ve cham)) duc ban hanh tri cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (sai ky)) dang hoa hoi. hieu ((va cam) or (ve cham)) duc ban hanh tri cua tre*.