Perhaps you should try some spelling variations:
hac thuc » hoc thuc, ha thuc, thach thuc
sach ty » sach y, sach tu, sach thu
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
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 ve) or (lieu va)) hac thuc va tinh 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 ve) OR (lieu va)) hac thuc va tinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) or (sac ky)) nang xa hoi. ((hieu ve) or (lieu va)) hac thuc va tinh di cua tre*.