Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
dua tren » dung tren
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
kem » kiem

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 tu nang xa hoi. hieu va cam duc va ((hanh lai) or (hanh kem)) ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu nang xa hoi. hieu va cam duc va ((hanh lai) OR (hanh kem)) ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach tu nang xa hoi. hieu va cam duc va ((hanh lai) or (hanh kem)) ((dua tren) or (cuu tre))*.