Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
hai truc » dai truc, hai trac, hang truc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van hai » van ha, van chat, van hanh
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua

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 (dang xay)) hoi. hieu van hai truc va danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky ((nang xa) OR (dang xay)) hoi. hieu van hai truc va danh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (dang xay)) hoi. hieu van hai truc va danh vi cua triet*.