Perhaps you should try some spelling variations:
thien nang » thien bang, thien dang, trien nang
dua tren » dung tren
su sach » vu sach
cam duc » cam xuc, cao duc, pham duc
tinh vi » trinh vi, tinh voi, tinh va
va tinh » may tinh
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
va cam » va cham, va cac, va cao

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

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