Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hieu van » hieu va, thien van, lieu va
sach lo » sach dao, sach doi, sach hoi
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
va dan » ca dan, va dao, va dau
vi cu » vi su, vi xu, vi du
va du » va dau, va su, va 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 ((sach lo) or (cach thoi)) nang xa hoi. hieu van cam xuc va dan ((vi cu) or (va du)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach lo) OR (cach thoi)) nang xa hoi. hieu van cam xuc va dan ((vi cu) OR (va du)) tren.
• Adding a wildcard symbol may retrieve word variants: te ((sach lo) or (cach thoi)) nang xa hoi. hieu van cam xuc va dan ((vi cu) or (va du)) tren*.