Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, nham thuc
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, tham thuc, cham soc
dinh dai » dinh dat, sinh dai, dinh dao
va dinh » van dinh, va kinh, va tinh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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 ((y nang) or (v nang)) xa hoi. lieu va ((cham tuc) OR (pham thuc)) va dinh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y nang) OR (v nang)) xa hoi. lieu va ((cham tuc) OR (pham thuc)) va dinh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y nang) or (v nang)) xa hoi. lieu va ((cham tuc) OR (pham thuc)) va dinh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y nang) or (v nang)) xa hoi. lieu va ((cham tuc) OR (pham thuc)) va dinh dai cua triet*.