Perhaps you should try some spelling variations:
truc dan » thuc dan, tuc dan, truc ban
su triet » su viet, su tien, ve triet
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
su sai » su tai, su hai, su dai
sai ky » sac ky
ve cau » ke cau, va cau, ve cac
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang x hoi. hieu ve cau ((truc dan) or (truc va)) hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang x hoi. hieu ve cau ((truc dan) OR (truc va)) hanh vi su triet*.