Perhaps you should try some spelling variations:
tang van » dang van, hoang van, trong van
cua tre » cua te, cuu tre, cua triet
dang de » dang deo, dung de, dang do
danh de » hanh de, dan de, danh di
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ve cam » ve cham, ve cac, va cam
sac ky » cac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sai ky) or (sac ky)) tang van hoi. hieu ve cam duc va ((danh de) OR (dang de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sai ky) OR (sac ky)) tang van hoi. hieu ve cam duc va ((danh de) OR (dang de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sai ky) or (sac ky)) tang van hoi. hieu ve cam duc va ((danh de) OR (dang de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((sai ky) or (sac ky)) tang van hoi. hieu ve cam duc va ((danh de) OR (dang de)) cua tre*.