Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
cam truc » cau truc, nam truc, lam truoc
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
so sanh » do sanh
y lang » o lang, _ lang, tay lang
ve cam » ve cham, ve cac, va cam

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) or (so sanh)) y lang xa hoi. hieu ve cam truc va tinh vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) y lang xa hoi. hieu ve cam truc va tinh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) y lang xa hoi. hieu ve cam truc va tinh vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) y lang xa hoi. hieu ve cam truc va tinh vi ((cua triet) OR (su triet))*.