Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va cham » va chat
va tham » van tham, va thanh, va thuat
va kinh » va tinh, qua kinh
kinh ve » kinh te, dinh ve, minh ve
ve cua » le cua, de cua, te cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu ((va cham) OR (va tham)) duc va kinh ve cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((va cham) OR (va tham)) duc va kinh ve cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((va cham) OR (va tham)) duc va kinh ve cua te*.