Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cac thuc » cach thuc, cac thu, can thuc
cua viet » ca viet, hoa viet, cua vat
tu cach » tu cac
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
vat dat » va dat, tat dat, van dat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky lang xa hoi. lieu va cac thuc vat dat dai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky lang xa hoi. lieu va cac thuc vat dat dai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky lang xa hoi. lieu va cac thuc vat dat dai ((cua triet) or (cua viet))*.