Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
su triet » su viet, su tien, ve triet
hanh lai » hanh lam, hanh tai, thanh loi
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cac luc » cau luc, coc luc, cac nuoc
luc va » duc va, tuc va, loc va

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 (lang xa)) hoi. lieu va cac luc va ((hanh lai) or (thanh lap)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac luc va ((hanh lai) OR (thanh lap)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac luc va ((hanh lai) or (thanh lap)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) OR (lang xa)) hoi. lieu va cac luc va ((hanh lai) or (thanh lap)) su triet*.