Perhaps you should try some spelling variations:
ve triet » va trien
su triet » su viet, su tien
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
tang ma » tang van
sach 7 » sach y, sach 2
tuc va » thuc va, truc va, tuc xa
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 7 ((tang ma) OR (mang may)) hoi. hieu ve cam tuc va hanh va ((su triet) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach 7 ((tang ma) OR (mang may)) hoi. hieu ve cam tuc va hanh va ((su triet) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach 7 ((tang ma) OR (mang may)) hoi. hieu ve cam tuc va hanh va ((su triet) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: su sach 7 ((tang ma) OR (mang may)) hoi. hieu ve cam tuc va hanh va ((su triet) or (ve triet))*.