Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
hanh tai » thanh tai, hang tai, han tai
cham luc » cham soc, nhan luc, chat lua
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
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: tu sach ty nang xa hoi. hieu va ((cham luc) OR (cham cuu)) va hanh tai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu va ((cham luc) OR (cham cuu)) va hanh tai ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang xa hoi. hieu va ((cham luc) OR (cham cuu)) va hanh tai ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu va ((cham luc) OR (cham cuu)) va hanh tai ((cuu tre) or (cua tre))*.