Perhaps you should try some spelling variations:
han thai » han tai, ban thai, van thai
va thieu » va thiet, va hieu, va tieu
su sach » so sach, vu sach
vu cham » va cham, vu kham, qua cham
tu cham » toc cham, thi cham
thai va » thai van
y nang » ly nang, v nang, may nang
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) OR (ky nang)) xa hoi. hieu ((vu cham) or (tu cham)) xuc va han thai va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) xa hoi. hieu ((vu cham) OR (tu cham)) xuc va han thai va thieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) xa hoi. hieu ((vu cham) or (tu cham)) xuc va han thai va thieu".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) xa hoi. hieu ((vu cham) or (tu cham)) xuc va han thai va thieu*.