Perhaps you should try some spelling variations:
thanh dam » thanh dat, thanh nam, thanh tam
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
dam cua » dai cua, day cua, nam cua
luc va » duc va, tuc va, loc va
ke cau » ket cau
ma hoi » mai hoi, xa hoi, ma hoa
ve cau » va cau, ve cac, le cau

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 ((ve cau) OR (ke cau)) luc va thanh dam 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 ((ve cau) OR (ke cau)) luc va thanh dam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu bach) or (so sach)) ly nang ma hoi. hieu ((ve cau) OR (ke cau)) luc va thanh dam cua tre".
• Adding a wildcard symbol may retrieve word variants: ((vu bach) or (so sach)) ly nang ma hoi. hieu ((ve cau) OR (ke cau)) luc va thanh dam cua tre*.