Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
danh hai » dang hai, lanh hai, manh hai
cau thuc » cau truc, cuu thuc, can thuc
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
bo sach » co sach, hoc sach
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
su sach » so sach
hai su » hai vu, lai su, hai so

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 (bo sach))) or (vu sach)) ky nang xa hoi. hieu van cau thuc va danh hai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (bo sach))) OR (vu sach)) ky nang xa hoi. hieu van cau thuc va danh hai su triet.
• Adding a wildcard symbol may retrieve word variants: ((((su sach) or (bo sach))) or (vu sach)) ky nang xa hoi. hieu van cau thuc va danh hai su triet*.