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
bac cua » ban cua, tac cua, bai cua
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 lang 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 lang 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 lang xa hoi. hieu ve ((cham luc) or (nhan luc)) ((va tinh) or (may tinh)) bac cua tre*.