Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
thai ky » thoi ky, than ky, thai ly
anh xa » anh xay, canh xa, anh va
tai ky » trai ky, dai ky, tai ku
ve cam » ve cham, ve cac, va cam
sai ky » sac ky

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

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