Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien nang » thien bang, thien dang, trien nang
van hanh » van thanh, ban hanh, van anh
cau treo » cau theo, cau tren, cau triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam

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

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