Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van tham » van thanh, van tuan, van tai
van chat » cao chat
thuc va » thuc vat, thuc dan, thuc day
dan sai » danh sai, doan sai, dan giai
dan tai » van tai, dan thi, han tai
nang o » nang co, nang ho, nang ro
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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