Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh lay » tinh lao, tinh lai, tinh tay
cua tre » cua te, cuu tre, dua tren
va tinh » may tinh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va tinh lay ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va tinh lay ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va tinh lay ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. hieu ((ve cam) OR (ve cac)) tuc va tinh lay ((cua tre) or (cua triet))*.