Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
sang ky » sang kyo, tang ky, bang ky
dang ky » dang y, dan ky, dong ky
nang xa » nang x, lang xa, nang ma
van cua » vang cua, ban cua, dan cua
su gia » su giao, su giau, vu gia
cua te » cua tu
co su » cao su, co so, co tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sang ky) OR (dang ky)) nang xa hoi. ((lieu va) or (hieu qua)) co su gia thanh van cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sang ky) OR (dang ky)) nang xa hoi. ((lieu va) OR (hieu qua)) co su gia thanh van cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sang ky) OR (dang ky)) nang xa hoi. ((lieu va) or (hieu qua)) co su gia thanh van cua te".
• Adding a wildcard symbol may retrieve word variants: so ((sang ky) OR (dang ky)) nang xa hoi. ((lieu va) or (hieu qua)) co su gia thanh van cua te*.