Perhaps you should try some spelling variations:
hac thuc » hoc thuc, ha thuc, thach thuc
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va hac » van hac, va khac, va cac
di cua » dai cua, doi cua, de cua

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

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