Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van hau » van ha, van hai, van dau
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
van cau » van dau, van chat, toan cau
va cua » va chua, via cua, ca 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 y ((nang xa) or (lang xa)) hoi. hieu ((van cau) or (van hau)) thuc va danh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (lang xa)) hoi. hieu ((van cau) OR (van hau)) thuc va danh va cua triet.
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (lang xa)) hoi. hieu ((van cau) or (van hau)) thuc va danh va cua triet*.