Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
cau xuc » cam xuc, cau luc, cau truc
hieu va » lieu va, hieu qua
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
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 thu ((lang xa) or (mang may)) hoi. ((hieu van) OR (hieu va)) cau xuc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((lang xa) OR (mang may)) hoi. ((hieu van) OR (hieu va)) cau xuc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu ((lang xa) or (mang may)) hoi. ((hieu van) OR (hieu va)) cau xuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: su sach thu ((lang xa) or (mang may)) hoi. ((hieu van) OR (hieu va)) cau xuc va hanh vi cua te*.