Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
vu sach » vu bach, vu khach
su sach » so sach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
van bac » van ban, van bao, van hac
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) OR (su sach)) ty nang xa hoi. hieu van bac duc va hanh thai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (su sach)) ty nang xa hoi. hieu van bac duc va hanh thai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) ty nang xa hoi. hieu van bac duc va hanh thai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) ty nang xa hoi. hieu van bac duc va hanh thai ((cua tre) or (cua triet))*.