Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien nang » thien bang, thien dang, trien nang
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
va danh » va dinh, va dan, dia danh
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, ban hanh
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach thien nang xa hoi. hieu van cam xuc ((va hanh) or (va danh)) vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thien nang xa hoi. hieu van cam xuc ((va hanh) OR (va danh)) vi ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: so sach thien nang xa hoi. hieu van cam xuc ((va hanh) or (va danh)) vi ((cua tre) or (cau tren))*.