Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
su sach » so sach, vu sach
ve cau » ke cau, va cau, ve cac
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu bach) or (su sach)) ((ly nang) or (ly vang)) mai hoi. hieu ve cau luc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (su sach)) ((ly nang) OR (ly vang)) mai hoi. hieu ve cau luc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (su sach)) ((ly nang) or (ly vang)) mai hoi. hieu ve cau luc va hanh dai cua tre*.