Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
cham luc » cham soc, nhan luc, chat lua
va thanh » gia thanh, ban thanh, va tinh
cham cuu » cap cuu, chat cua
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
y hang » ly hang, ty hang, yu hang
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y hang ((ma hoi) OR (xa hoi)). hieu va ((cham luc) or (cham cuu)) va thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y hang ((ma hoi) OR (xa hoi)). hieu va ((cham luc) OR (cham cuu)) va thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y hang ((ma hoi) OR (xa hoi)). hieu va ((cham luc) or (cham cuu)) va thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y hang ((ma hoi) OR (xa hoi)). hieu va ((cham luc) or (cham cuu)) va thanh vai cua tre*.