Perhaps you should try some spelling variations:
tinh tai » trinh tai, tinh thai, hinh tai
tinh hai » tinh thai, tinh chat, trinh han
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ma hoi. hieu ve cac duc va ((tinh tai) or (tinh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ma hoi. hieu ve cac duc va ((tinh tai) OR (tinh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ma hoi. hieu ve cac duc va ((tinh tai) or (tinh hai)) cua tre*.