Perhaps you should try some spelling variations:
tinh san » trinh san, tinh sang, tinh son
cua tre » cua te, cuu tre, cua triet
nam tuc » nam thuc, nam truc, nam thuoc
san cua » sang cua, ban cua, dan cua
va tinh » may tinh
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
nam tu » nam thu, nam thuc
te sai » te tai, te bai, te lai
sai ky » sac ky
ma hoi » xa 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: te sai ky nang ((ma hoi) or (mai hoi)). hieu ve ((nam tuc) or (nam tu)) va tinh san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang ((ma hoi) OR (mai hoi)). hieu ve ((nam tuc) OR (nam tu)) va tinh san cua tre.
• Adding a wildcard symbol may retrieve word variants: te sai ky nang ((ma hoi) or (mai hoi)). hieu ve ((nam tuc) or (nam tu)) va tinh san cua tre*.