Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nuoc thuc » nuoc thu, nguon thuc, hoc thuc
doan dau » doan dieu, phan dau, doan va
hieu ve » hieu va, hieu van
ve nuoc » ve duoc
dan dau » danh dau, van dau, dan dat
vai cua » dai cua, hai cua, lai cua
su sach » so sach, vu sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly 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: su sach ((y nang) or (v nang)) xa hoi. hieu ve nuoc thuc ((dan dau) OR (doan dau)) vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (v nang)) xa hoi. hieu ve nuoc thuc ((dan dau) OR (doan dau)) vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) or (v nang)) xa hoi. hieu ve nuoc thuc ((dan dau) OR (doan dau)) vai cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (v nang)) xa hoi. hieu ve nuoc thuc ((dan dau) OR (doan dau)) vai cua triet*.