Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach tu, sach thu
sach ky » sac ky, sach y, sach kem
va cham » va chat, va tham
va dinh » van dinh, va kinh, va tinh
dinh cu » dinh cuu, dinh chuc, dinh chau
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho
cu va » cuu va, tu va, su va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (va cham)) duc va dinh cu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) OR (va cham)) duc va dinh cu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (va cham)) duc va dinh cu va triet".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) OR (sach ty)) nang x hoi. hieu ((ve cam) or (va cham)) duc va dinh cu va triet*.