Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van xuat » san xuat, va xuat, phan xuat
xuat tuc » xuat thuc, luat tuc, xuat tu
su sach » so sach
vu sach » vu bach, vu khach
tang ho » tang cho, tung ho, tang ha
xa hanh » xa thanh, xa khanh, va hanh
y tang » ky tang, 6 tang, 7 tang
ho hoi » hoc hoi, hoa hoi, hoi hoi
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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 (vu sach)) y tang ho hoi. hieu van xuat tuc xa hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y tang ho hoi. hieu van xuat tuc xa hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y tang ho hoi. hieu van xuat tuc xa hanh vi cua tu*.