Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
tu sach » thu sach, su sach, te sach
qua cac » cua cac
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
luc va » loc va
di cua » dai cua, doi cua, de cua

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 y nang mai khoi. hieu qua cac ((((tuc va) or (luc va))) or (duc va)) hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai khoi. hieu qua cac ((((tuc va) OR (luc va))) OR (duc va)) hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai khoi. hieu qua cac ((((tuc va) or (luc va))) or (duc va)) hanh di cua triet*.