Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
doi cua » dai cua, hoi cua
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
su sach » so sach, vu sach
qua cau » quan cau, qua cac, qua ca
nang xa » lang xa, nang ma, mang xa
sach v » sach va, sach y, sach 2

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v ((nang xa) OR (nang x)) hoi. hieu qua cau ((truc va) or (thuc va)) hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v ((nang xa) OR (nang x)) hoi. hieu qua cau ((truc va) OR (thuc va)) hanh doi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((nang xa) OR (nang x)) hoi. hieu qua cau ((truc va) or (thuc va)) hanh doi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) OR (nang x)) hoi. hieu qua cau ((truc va) or (thuc va)) hanh doi cua triet*.