Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nhan tai » hang tai, van tai, toan tai
hieu van » hieu va, thien van, lieu va
cau luc » cau truc, cau phuc
cua tre » cuu tre, cua triet, dua tren
va nhan » van nhan, ca nhan, va phan
van cau » van dau, van hau, van chat
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
luc va » duc va, tuc va, loc va
cua te » cua tu

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) OR (nang x)) hoi. hieu van cau luc va nhan tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cau luc va nhan tai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cau luc va nhan tai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) OR (nang x)) hoi. hieu van cau luc va nhan tai ((cua tre) or (cua te))*.