Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh dai » hanh tai, hanh dao, vanh dai
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
truc va » thuc vat, trung va
thuc va » thuc vat, thuc dan, thuc day
y xang » ty xang
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 y xang xa hoi. hieu va phat ((truc va) or (thuc va)) hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y xang xa hoi. hieu va phat ((truc va) OR (thuc va)) hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: hoc sach y xang xa hoi. hieu va phat ((truc va) or (thuc va)) hanh dai cua te*.