Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
pham tai » pham thi, pham van
dang xay » dang van, van xay
duc san » duc van, dac san, duc ban
van cau » van dau, van hau, van chat
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cuc tu » cuc du, luc tu, duc 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 ty ((nang xa) or (dang xay)) hoi. hieu van cau ((duc san) or (duc tan)) pham tai cuc tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (dang xay)) hoi. hieu van cau ((duc san) OR (duc tan)) pham tai cuc tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (dang xay)) hoi. hieu van cau ((duc san) or (duc tan)) pham tai cuc tu*.