Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
tu cham » toc cham, thi cham
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
thai va » thai van
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 ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (tu cham)) xuc va hanh thai va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) OR (tu cham)) xuc va hanh thai va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (tu cham)) xuc va hanh thai va thiet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) OR (lang xa)) hoi. hieu ((ve cham) or (tu cham)) xuc va hanh thai va thiet*.