Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
ty sang » ty xang, ty hang, duy sang
cuu tre » cau tren, cau treo
soc va » hoc va, loc va, doc va
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty sang ((ma hoi) or (xa hoi)). hieu vu cham soc va hanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty sang ((ma hoi) OR (xa hoi)). hieu vu cham soc va hanh lai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty sang ((ma hoi) or (xa hoi)). hieu vu cham soc va hanh lai ((cua tre) or (cuu tre))*.