Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
thuc dan » thuc hanh, thuc vat
sach ty » sach y, sach tu, sach thu
hai cua » thai cua, dai cua, hoi cua
su sach » so sach, vu sach
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: su sach ty ((nang xa) or (lang xa)) hoi. hieu va nam ((thuc dan) OR (hoc dan)) hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (lang xa)) hoi. hieu va nam ((thuc dan) OR (hoc dan)) hanh hai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) or (lang xa)) hoi. hieu va nam ((thuc dan) OR (hoc dan)) hanh hai cua triet*".