Perhaps you should try some spelling variations:
chet triet » chuyen triet, thuyet triet
lam chet » lam chat, la chet, lam chu
hanh lam » thanh lap, hanh kem, hanh va
va hanh » van hanh, va thanh, va danh
vien da » vien dai, hien dai
su sach » vu sach
tang ha » lang ha, tang ma, trung ha
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach
ve cac » va cac, vien cac

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 sach)) ky tang ha noi. hieu ((ve cac) or (vien da)) duc va hanh lam chet triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky tang ha noi. hieu ((ve cac) OR (vien da)) duc va hanh lam chet triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky tang ha noi. hieu ((ve cac) or (vien da)) duc va hanh lam chet triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky tang ha noi. hieu ((ve cac) or (vien da)) duc va hanh lam chet triet*.