Perhaps you should try some spelling variations:
luoc dai » cuoc doi, hoc dai, duc dai
luoc can » luc canh, hoc can, duoc cac
cua tre » cua te, cuu tre, cua triet
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
vi cua » vai cua, di cua
te sac » te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky nang xa hoi. hieu ve cham ((luoc can) OR (luoc dai)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky nang xa hoi. hieu ve cham ((luoc can) OR (luoc dai)) hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky nang xa hoi. hieu ve cham ((luoc can) OR (luoc dai)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky nang xa hoi. hieu ve cham ((luoc can) OR (luoc dai)) hanh vi cua tre*.