Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
mai khoi » mai khoa, tai khoa, cac khoi
kem cua » em cua, keo cua, diem cua
duc van » duc va, duc tan, duc manh
van hau » van hai, van dau, van hac
te sach » toc sach
mai hoi » dai hoi, lai hoi, mai doi
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
van ha » van hoa, van chat, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ly nang ((mai hoi) OR (mai khoi)). hieu ((van hau) or (van ha)) duc van hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((mai hoi) OR (mai khoi)). hieu ((van hau) OR (van ha)) duc van hanh kem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ((mai hoi) OR (mai khoi)). hieu ((van hau) or (van ha)) duc van hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((mai hoi) OR (mai khoi)). hieu ((van hau) or (van ha)) duc van hanh kem cua tre*.