Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
sach ly » sach y, sach lo, sach ty
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
lam tuc » lam thuoc, lam truoc, luat tuc
va lam » van lam, va lap
hai su » hai vu, lai su, hai so

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 ly nang ((xa hoi) or (ma hoa)). hieu va lam tuc ((va danh) OR (va dinh)) hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang ((xa hoi) OR (ma hoa)). hieu va lam tuc ((va danh) OR (va dinh)) hai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang ((xa hoi) or (ma hoa)). hieu va lam tuc ((va danh) OR (va dinh)) hai su triet".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang ((xa hoi) or (ma hoa)). hieu va lam tuc ((va danh) OR (va dinh)) hai su triet*.