Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » vu sach
danh vi » dinh vi, danh di, danh va
cac tuc » cac toc, cac tu, cac tac
van cac » van hac, van cau, van bac
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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)) ly nang x ho. hieu van cac tuc va ((danh vi) OR (hanh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ly nang x ho. hieu van cac tuc va ((danh vi) OR (hanh vi)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ly nang x ho. hieu van cac tuc va ((danh vi) OR (hanh vi)) cua te*".