Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
lang xa » dang xay, lang van
lang ha » long ha
qua cam » qua cham, qua cac, qua ca
duc van » duc va, duc manh, duc phan
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
su sai » su tai, su hai, su dai
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 sai ky ((lang xa) OR (lang ha)) hoi. hieu qua cam ((duc van) or (duc tan)) hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky ((lang xa) OR (lang ha)) hoi. hieu qua cam ((duc van) OR (duc tan)) hanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky ((lang xa) OR (lang ha)) hoi. hieu qua cam ((duc van) or (duc tan)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky ((lang xa) OR (lang ha)) hoi. hieu qua cam ((duc van) or (duc tan)) hanh tai cua tre*.