Perhaps you should try some spelling variations:
thanh dao » thanh dat, thanh dam, thanh do
nang lai » nang tai, mang lai, nang cai
hieu van » thien van, lieu va
xa thanh » va thanh, ha thanh, ta thanh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
lai hoa » dai hoa, loai hoc
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
dao cuu » dao huu, dao cau, dao chu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky nang lai hoa. ((((hieu van) or (hieu ve))) or (hieu va)) cam tuc xa thanh dao cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky nang lai hoa. ((((hieu van) OR (hieu ve))) OR (hieu va)) cam tuc xa thanh dao cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky nang lai hoa. ((((hieu van) or (hieu ve))) or (hieu va)) cam tuc xa thanh dao cuu tre*.