Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
sach ky » sach y, sach ty, sach kem
tang xa » trang xa, tang ma, lang xa
van anh » van thanh, tuan anh, van minh
sac ky » cac ky, sai ky
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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 ky) OR (sac ky)) tang xa hoi. hieu van ((nam thuc) or (cam xuc)) van anh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) tang xa hoi. hieu van ((nam thuc) OR (cam xuc)) van anh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) OR (sac ky)) tang xa hoi. hieu van ((nam thuc) or (cam xuc)) van anh vi cua triet*".