Perhaps you should try some spelling variations:
ban thai » ban than, ban tai, ban thoi
chat xuc » chat huu, cam xuc, chao xu
su sach » so sach, vu sach
ban thi » dan thi, van thi, can thi
ve chat » va chat, van chat
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
xuc va » duc va, tuc va, luc va
thiet » thieu

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