Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nam thuc » nam thuoc, am thuc, nam thu
hang hai » hoang hai, hang tai, thanh hai
hanh hai » thanh hai, nhanh hai, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
vu sach » vu bach, su sach, vu khach
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach tu ((nang xa) or (lang xa)) hoi. hieu va nam thuc dan ((hanh hai) OR (hang hai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu ((nang xa) OR (lang xa)) hoi. hieu va nam thuc dan ((hanh hai) OR (hang hai)) cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach tu ((nang xa) or (lang xa)) hoi. hieu va nam thuc dan ((hanh hai) OR (hang hai)) cua triet*".