Perhaps you should try some spelling variations:
va thieu » va thiet, va hieu, va tieu
han thai » han tai, ban thai, van thai
cham xuc » cam xuc, chat xuc, cham soc
hieu va » lieu va, hieu qua
thai va » thai van
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu van
xuc va » duc va, tuc va, luc va
va han » va phan, van han, va hanh

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 y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cham xuc va han thai va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. ((hieu ve) OR (hieu va)) cham xuc va han thai va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cham xuc va han thai va thieu".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang x)) hoi. ((hieu ve) OR (hieu va)) cham xuc va han thai va thieu*.