Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cham sac » cham soc, pham sach, cap sac
van hanh » ban hanh, van anh, van ban
su sach » so sach, vu sach
su cham » su pham, tu cham, vu cham
hieu su » hieu sau, tieu su, hieu so
tu lang » cu lang, tu lanh, xu lang
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

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 ((tu lang) or (ty xang)) xa hoi. hieu su cham sac ((van hanh) OR (van thanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((tu lang) OR (ty xang)) xa hoi. hieu su cham sac ((van hanh) OR (van thanh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu lang) or (ty xang)) xa hoi. hieu su cham sac ((van hanh) OR (van thanh)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu lang) or (ty xang)) xa hoi. hieu su cham sac ((van hanh) OR (van thanh)) de cua tre*.