Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » su triet, va triet
dang tinh » dang dinh, dang sinh, dang vinh
thuc dang » thuoc dang, thuc dan, thuc dung
cua viet » ca viet, hoa viet, cua vat
tinh vi » trinh vi, tinh voi, tinh va
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va nham » va cham, va tham, va nha

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) lang xa hoi. hieu va nham thuc dang tinh vi ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) lang xa hoi. hieu va nham thuc dang tinh vi ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) lang xa hoi. hieu va nham thuc dang tinh vi ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) lang xa hoi. hieu va nham thuc dang tinh vi ((cua triet) OR (cua viet))*.