Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
thanh dam » thanh nam, thanh tam, thanh lam
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
cau luc » cau truc, cau phuc
van cau » van dau, van hau, van chat
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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 (so sach)) ly nang ma hoi. hieu van cau luc va ((thanh dam) or (thanh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu bach) OR (so sach)) ly nang ma hoi. hieu van cau luc va ((thanh dam) OR (thanh dat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (so sach)) ly nang ma hoi. hieu van cau luc va ((thanh dam) or (thanh dat)) cua tre*.