Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) or (sai ky)) nang xa hoi. ((lieu va) or (hieu va)) cam duc va thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sai ky)) nang xa hoi. ((lieu va) OR (hieu va)) cam duc va thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sai ky)) nang xa hoi. ((lieu va) or (hieu va)) cam duc va thanh va cua tre*.