Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
ve cham » ve chat, vu cham, ve chim
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cham » va chat, va tham
tuc va » truc va, tuc xa, duc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. hieu ((ve cham) or (va cham)) ((tuc va) OR (thuc va)) hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu ((ve cham) OR (va cham)) ((tuc va) OR (thuc va)) hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu ((ve cham) or (va cham)) ((tuc va) OR (thuc va)) hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu ((ve cham) or (va cham)) ((tuc va) OR (thuc va)) hanh dai cua triet*.