Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, va cam

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 nang xa hoi. hieu ve cam duc ((va hanh) OR (va thanh)) di ((cuu tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ve cam duc ((va hanh) OR (va thanh)) di ((cuu tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu ve cam duc ((va hanh) OR (va thanh)) di ((cuu tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ve cam duc ((va hanh) OR (va thanh)) di ((cuu tre) or (ve triet))*.