Perhaps you should try some spelling variations:
tinh loi » tinh luoi, tinh doi, dinh loi
cham duc » pham duc, cham soc, pham duy
hieu su » hieu sau, tieu su, hieu so
ky hang » ky nang, ly hang, ky dang
tai hoi » tai khoi, dai hoi, tai hoe
cua tre » cuu tre, cua triet, dua tren
tai hai » thi hai, dai hai, tai ha
su cham » su pham, tu cham, vu cham
va tinh » may tinh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky hang ((tai hoi) OR (tai hai)). hieu su cham duc va tinh loi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky hang ((tai hoi) OR (tai hai)). hieu su cham duc va tinh loi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky hang ((tai hoi) OR (tai hai)). hieu su cham duc va tinh loi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sac ky hang ((tai hoi) OR (tai hai)). hieu su cham duc va tinh loi ((cua tre) or (cua te))*.