Perhaps you should try some spelling variations:
thien van » thi van
cua triet » cua viet, su triet, va triet
cau treo » cau theo, cau tren, cau triet
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac
cac toc » cac toi, cac nuoc, cac thoi
ta hanh » ta thanh, va hanh, tu hanh
toc ta » toc tay, toc thai

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 ly nang xa hoi. thien van cac toc ta hanh vi ((cua triet) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang xa hoi. thien van cac toc ta hanh vi ((cua triet) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang xa hoi. thien van cac toc ta hanh vi ((cua triet) or (cau treo))*.