Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh doi » thanh doi, hanh noi, hang doi
sach ty » sach y, sach tu, sach thu
doi cua » dai cua, hoi cua, dong cua
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
tuc va » truc va, tuc xa, duc va
ve cam » ve cham, ve cac, va cam

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 ty ((nang xa) or (lang xa)) hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh doi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang xa)) hoi. hieu ve cam ((tuc va) OR (thuc va)) hanh doi cua triet*".