Perhaps you should try some spelling variations:
dang hoai » dang hai, dang loai, dung hoai
dang hoa » dang khoa, dong hoa, hang hoa
anh quan » anh tuan, ban quan, anh nhan
quan vi » quan li, quan tri, quan doi
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao
cao so » cao son, co so, cao su
so anh » so sanh, so danh, do anh
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((dang hoa) or (dang hoai)) hoi. hieu va cao so anh quan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((dang hoa) OR (dang hoai)) hoi. hieu va cao so anh quan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((dang hoa) or (dang hoai)) hoi. hieu va cao so anh quan vi cua tre*.