Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
va thanh » gia thanh, va tinh, le thanh
lang van » dang van, tang van, hoang van
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
cac tho » cac thoi, cac tro, cac thu
te sac » te sach, te cac, te san
ve cac » va cac, vien cac
sac ky » cac ky, sai ky
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: te sac ky ((nang xa) or (lang van)) hoi. hieu ve cac tho ((va thanh) OR (ban thanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (lang van)) hoi. hieu ve cac tho ((va thanh) OR (ban thanh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (lang van)) hoi. hieu ve cac tho ((va thanh) OR (ban thanh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (lang van)) hoi. hieu ve cac tho ((va thanh) OR (ban thanh)) vai cua te*.