Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
vat hanh » vat thanh, van hanh, va hanh
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, dua tren

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. lieu va cac thuc vat hanh hai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac thuc vat hanh hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac thuc vat hanh hai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac thuc vat hanh hai ((cua tre) or (cua triet))*.