Perhaps you should try some spelling variations:
ve triet » va trien, su triet
danh hai » dang hai, lanh hai, manh hai
truc va » thuc va, thuc vat, trung va
su sach » vu sach
hieu va » lieu va, hieu qua
so sach » so sanh, bo sach, co sach
hai ve » hoai ve, hai va, hai vu
va hoc » van hoc
x hoi » xa hoi, o hoi, x ho

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) or (so sach)) ky nang x hoi. hieu va hoc ((truc va) or (tuc xa)) danh hai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. hieu va hoc ((truc va) OR (tuc xa)) danh hai ve triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang x hoi. hieu va hoc ((truc va) or (tuc xa)) danh hai ve triet*.