Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham truc » cau truc, nham thuc, pham thuc
dinh dau » dinh dat, dinh du, danh dau
toc sach » hoc sach, doc sach, thuoc sach
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
truc va » thuc va, thuc vat, trung va
va dinh » van dinh, va kinh, va tinh
nang xa » lang xa, nang ma, mang xa
dau cua » dai cua, day cua, cau cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) or (thi van)) cham truc va dinh dau cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) OR (thi van)) cham truc va dinh dau cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) or (thi van)) cham truc va dinh dau cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky ((nang xa) OR (nang x)) hoi. ((thien van) or (thi van)) cham truc va dinh dau cua triet*.