Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
lieu van » lieu va, hieu van, sieu van
van tham » van thanh, van tuan, van chat
va nang » van nang, da nang, cam nang
vu nang » vuc nang, vu dang, v nang
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
hang di » hang doi, hang vi, hang dien
di cua » dai cua, doi cua, de cua
cua te » cua tu

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 ((vu nang) or (va nang)) xa hoi. lieu van tham ((truc va) OR (thuc va)) hang di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((vu nang) OR (va nang)) xa hoi. lieu van tham ((truc va) OR (thuc va)) hang di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((vu nang) or (va nang)) xa hoi. lieu van tham ((truc va) OR (thuc va)) hang di cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((vu nang) or (va nang)) xa hoi. lieu van tham ((truc va) OR (thuc va)) hang di cua te*.