Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
tinh bac » tinh cach, tinh hoc, tinh lao
nhan luc » nang luc
cham luc » cham soc, cham cuu, chat lua
hoc sach » hoc sinh, hoc cac, hoc anh
hieu ve » hieu va, hieu van
va tinh » may tinh
bac cua » ban cua, tac cua, bai cua
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (hoc sach)) ky nang x hoi. hieu ve ((cham luc) or (nhan luc)) va tinh bac cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ky nang x hoi. hieu ve ((cham luc) OR (nhan luc)) va tinh bac cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ky nang x hoi. hieu ve ((cham luc) or (nhan luc)) va tinh bac cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ky nang x hoi. hieu ve ((cham luc) or (nhan luc)) va tinh bac cua tre*.