Perhaps you should try some spelling variations:
cac thoi » cac toi, cac hop, cac tro
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
hieu va » lieu va, hieu qua
thoi va » hoi va, thai va, tho va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet

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