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
hanh doi » thanh doi, hanh noi, hang doi
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
doi cua » dai cua, hoi cua, dong cua
y nang » ky nang, ly nang, v nang
xuc va » tuc va, xac va
luc 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 y nang mai khoi. hieu va cac ((((xuc va) or (luc va))) or (duc va)) hanh doi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai khoi. hieu va cac ((((xuc va) OR (luc va))) OR (duc va)) hanh doi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai khoi. hieu va cac ((((xuc va) or (luc va))) or (duc va)) hanh doi cua triet*.