Perhaps you should try some spelling variations:
lang thai » lang chai, dang thai, hoang thai
toc sach » hoc sach, doc sach, thuoc sach
lang hai » lang chai, lang ha, hang hai
cao loc » cao hoc, cao toc, cao oc
cua tre » cua te, cuu tre, cua triet
tang ha » lang ha, tang ma, trung ha
ky tang » ky nang, ky dang, kho tang
ha hoi » hoa hoi, ha noi, xa hoi
loc va » hoc va, luc va
va cao » va cac, va co, va dao

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)) ky tang ha hoi. lieu va cao loc va ((lang thai) OR (lang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky tang ha hoi. lieu va cao loc va ((lang thai) OR (lang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky tang ha hoi. lieu va cao loc va ((lang thai) OR (lang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky tang ha hoi. lieu va cao loc va ((lang thai) OR (lang hai)) cua tre*.