Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ninh viec » ninh viet, dinh viec, sinh viec
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
cam duc » cao duc, pham duc, nam duoc
va ninh » van ninh, va kinh, va tinh
hieu va » lieu va, hieu qua

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

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