Perhaps you should try some spelling variations:
nhanh than » nhanh thanh, nhanh thang, nhanh thai
van nhanh » van thanh, van hanh, van khanh
tai khoa » da khoa, noi khoa
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
sai kho » dai kho, dai khoa, mai khoa
tang xa » trang xa, tang ma, lang xa
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet

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 kho) or (tai khoa)) tang xa hoi. hieu van cam duc van nhanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sai kho) OR (tai khoa)) tang xa hoi. hieu van cam duc van nhanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sai kho) or (tai khoa)) tang xa hoi. hieu van cam duc van nhanh than cua tre*.