Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
lang van » dang van, tang van, hoang van
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
va cam » va cham, va cao, va cai
di su » doi su, ki su, da su

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