Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh doi » thanh doi, hanh noi, hang doi
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
sach ty » sach y, sach tu, sach thu
van cam » van lam, van cau, van dam
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
xuc va » duc va, tuc va, luc va
doi su » oi su, don su, voi su

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 ma) or (lang xa)) hoi. hieu ((van cam) OR (van nam)) xuc va hanh doi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (lang xa)) hoi. hieu ((van cam) OR (van nam)) xuc va hanh doi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang ma) or (lang xa)) hoi. hieu ((van cam) OR (van nam)) xuc va hanh doi su triet*".