Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, cau treo
truc va » thuc va, thuc vat, trung va
nang va » nang van, hang va, nang ma
va nang » van nang, da nang, cam nang
vu sach » vu bach, su sach, vu khach
qua cac » cua cac
qua cau » quan cau, qua ca, qua cai
lang xa » lang ha, dang xay, lang van
ca tren » cu tren, la tren, co tren
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y lang xa hoi. hieu ((qua cau) or (qua cac)) truc va nang va ((cau tren) OR (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y lang xa hoi. hieu ((qua cau) OR (qua cac)) truc va nang va ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y lang xa hoi. hieu ((qua cau) or (qua cac)) truc va nang va ((cau tren) OR (ca tren))".
• Adding a wildcard symbol may retrieve word variants: vu sach y lang xa hoi. hieu ((qua cau) or (qua cac)) truc va nang va ((cau tren) OR (ca tren))*.