Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cham luc » cham soc, cham cuu, chat lua
nhan luc » nang luc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
bac cua » ban cua, tac cua, bai cua
cua tre » cua te, cuu tre, cua triet

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

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