Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
lang xa » lang ha, dang xay, lang van
thi van » thi lan, thi hanh, thi nang
nam duc » nam duoc, pham duc, nam thuc
va hang » van hang, va nang, va lang
hang le » hoang le, tang le, hang ly
y lang » o lang, _ lang, tay lang
le cua » ly 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: ((te sach) OR (toc sach)) y lang xa hoi. ((thien van) or (thi van)) nam duc va hang le cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y lang xa hoi. ((thien van) OR (thi van)) nam duc va hang le cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y lang xa hoi. ((thien van) or (thi van)) nam duc va hang le cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y lang xa hoi. ((thien van) or (thi van)) nam duc va hang le cua te*.