Perhaps you should try some spelling variations:
van cham » van tham, va cham, van pham
van chat » cao chat
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va nhan » van nhan, ca nhan, va phan
xuc va » duc va, tuc va, luc va
tai va » thai va, tri va, dai 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 ky nang xa hoi. hieu ((van cham) or (van chat)) xuc va nhan ((tai va) OR (mai va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu ((van cham) OR (van chat)) xuc va nhan ((tai va) OR (mai va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((van cham) or (van chat)) xuc va nhan ((tai va) OR (mai va)) thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((van cham) or (van chat)) xuc va nhan ((tai va) OR (mai va)) thiet*.