Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
hac truc » hoc truc, hang truc, sach truc
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
van hac » van hoc, van ha, van hai
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 va » vi van, vai va, vu va

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 hac truc va danh vi va 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 hac truc va danh vi va triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach ky ((nang xa) or (dang xay)) hoi. hieu van hac truc va danh vi va triet*.