Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
su sach » vu sach
so sach » so sanh, bo sach, co sach
lang xa » lang ha, dang xay, lang van
cam tu » cam thu, nam tu, dam tu
y lang » o lang, _ lang, tay lang
vi va » vi van, vai va, vu va

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)) y lang xa hoi. hieu van ((cam tu) or (nam thuc)) va hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y lang xa hoi. hieu van ((cam tu) OR (nam thuc)) va hanh vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y lang xa hoi. hieu van ((cam tu) or (nam thuc)) va hanh vi va triet*".