Perhaps you should try some spelling variations:
chau triet » cau triet, cau trieu, chau tuyet
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, thanh lap, thanh loi
hanh tai » thanh tai, hang tai, han tai
phan duc » pham duc, phan tu, phan dau
tu sach » thu sach, su sach, te sach
ve phan » va phan, ke phan, ve phat
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu ve phan duc va ((hanh lai) or (hanh tai)) ((chau triet) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu ve phan duc va ((hanh lai) OR (hanh tai)) ((chau triet) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. hieu ve phan duc va ((hanh lai) or (hanh tai)) ((chau triet) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu ve phan duc va ((hanh lai) or (hanh tai)) ((chau triet) OR (cua triet))*.