Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
tham xuc » tham nuoc, tham thuc, pham duc
van tham » van thanh, van tuan, van chat
lieu van » lieu va, hieu van, sieu van
thi nang » thi cong, thi hanh
ki nang » ky nang
va tinh » may tinh
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: doc sach ((thi nang) OR (ki nang)) xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ((thi nang) OR (ki nang)) xa hoi. lieu van tham xuc ((va tinh) OR (gia thanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ((thi nang) OR (ki nang)) xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: doc sach ((thi nang) OR (ki nang)) xa hoi. lieu van tham xuc ((va tinh) or (gia thanh)) di cua te*.