Perhaps you should try some spelling variations:
tinh le » thinh le, trinh le, dinh le
va tinh » may tinh
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
sach ky » sach y, sach ty, sach kem
hieu va » lieu va, hieu qua
le cua » ly cua
soc va » hoc va, loc va, doc va
cua te » cua tu
sac ky » cac ky, sai ky

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) or (sac ky)) nang xa hoi. ((hieu ve) OR (hieu va)) cham soc va tinh le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang xa hoi. ((hieu ve) OR (hieu va)) cham soc va tinh le cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sac ky)) nang xa hoi. ((hieu ve) OR (hieu va)) cham soc va tinh le cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) nang xa hoi. ((hieu ve) OR (hieu va)) cham soc va tinh le cua te*.