Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
phan lap » phan dau
sach tu » sach thu, cach tu, sach ty
lap cua » lai cua, tap cua, lam cua
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
hieu va » lieu va, hieu qua
nang ho » nang hoc, nang co, tang ho
ho hoi » hoc hoi, hoa hoi, hoi hoi
va cau » van cau, va cac, va dau

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 tu) or (sach y)) nang ho hoi. hieu va cau ((truc va) OR (thuc va)) phan lap cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach y)) nang ho hoi. hieu va cau ((truc va) OR (thuc va)) phan lap cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) or (sach y)) nang ho hoi. hieu va cau ((truc va) OR (thuc va)) phan lap cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach y)) nang ho hoi. hieu va cau ((truc va) OR (thuc va)) phan lap cua triet*.