Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh di » hanh vi, hanh de, hang di
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
tuc va » thuc va, truc va, tuc xa
luc va » duc va, loc va
di cua » dai cua, doi cua, de cua
ve cam » ve cham, ve cac, va cam

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 ve cam ((tuc va) or (luc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (lang xa)) hoi. hieu ve cam ((tuc va) OR (luc va)) hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (lang xa)) hoi. hieu ve cam ((tuc va) or (luc va)) hanh di cua triet*.