Perhaps you should try some spelling variations:
sang tao » hang tai
luoc can » luc canh, hoc can, luoc dai
cua tre » cua te, cuu tre, cua triet
hanh di » hanh vi, hanh de, hang di
hieu va » lieu va, hieu qua
tao hoi » tao khoi, tao boi, tay hoi
hieu ve » hieu van
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san

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 sang tao hoi. ((hieu ve) or (hieu va)) cac ((duc tan) or (luoc can)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky sang tao hoi. ((hieu ve) OR (hieu va)) cac ((duc tan) OR (luoc can)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky sang tao hoi. ((hieu ve) or (hieu va)) cac ((duc tan) or (luoc can)) hanh di cua tre*.