Perhaps you should try some spelling variations:
tinh van » trinh van, dinh van, tinh va
cau tren » cu tren, dau tren, ca tren
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cho tre » cho thue, khoe tre
y lang » o lang, _ lang, tay lang
xac va » tac va, ac va, bac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y lang xa hoi. hieu va cac ((xac va) or (duc va)) tinh van ((cau tren) or (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. hieu va cac ((xac va) OR (duc va)) tinh van ((cau tren) OR (cho tre)).
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu va cac ((xac va) or (duc va)) tinh van ((cau tren) or (cho tre))*.