Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
lieu van » lieu va, hieu van, sieu van
van tham » van thanh, van tuan, van chat
tham xuc » tham nuoc, tham thuc, pham duc
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach thi nang xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach thi nang xa hoi. lieu van tham xuc ((va tinh) OR (gia thanh)) di ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach thi nang xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: doc sach thi nang xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di ((cua te) OR (cua tu))*.