Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh va » thanh van, hanh va, thanh ha
thanh le » thinh le, thanh ve, thanh de
duc van » duc va, duc tan, duc manh
te sach » toc sach
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
cam duc » cam xuc, cao duc, pham duc
va cam » va cham, va cac, va cao
y nang » ky nang, v nang, may nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) OR (ly nang)) xa hoi. hieu va cam duc van ((thanh le) or (thanh va)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) xa hoi. hieu va cam duc van ((thanh le) OR (thanh va)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ly nang)) xa hoi. hieu va cam duc van ((thanh le) or (thanh va)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ly nang)) xa hoi. hieu va cam duc van ((thanh le) or (thanh va)) cua triet*.