Perhaps you should try some spelling variations:
cham duc » pham duc, pham duy, phan duc
thi nang » thi cong, ki nang, thi hanh
te sach » toc sach
cuu tre » cau tren, cau treo
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cua tre » cua te, cua triet, dua tren
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. thi nang ((cham duc) or (cham soc)) va danh vi ((cuu tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. thi nang ((cham duc) OR (cham soc)) va danh vi ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. thi nang ((cham duc) or (cham soc)) va danh vi ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. thi nang ((cham duc) or (cham soc)) va danh vi ((cuu tre) OR (cua tre))*.