Perhaps you should try some spelling variations:
cham luoc » cham soc, khai luoc, kham cuoc
van hanh » van thanh, ban hanh, van anh
luoc van » luoc can, luoc va, luc van
hieu vu » hieu va, hieu ve, hieu su
hanh di » hanh vi, hanh de, hang di
vu cham » va cham, vu kham, tu cham
tu sach » thu sach, su sach, tu cach
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu vu cham luoc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu vu cham luoc van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu vu cham luoc van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ((ky lang) OR (ky dang)) xa hoi. hieu vu cham luoc van hanh di cua tre*.