Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham xuc » cam xuc, chat xuc, cham soc
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, dua tren, cua thep
xuc va » duc va, tuc va, luc va
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: te sach ty nang cao hoi. hieu van cham xuc va hanh lai ((((cua tre) OR (cua triet))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cao hoi. hieu van cham xuc va hanh lai ((((cua tre) OR (cua triet))) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang cao hoi. hieu van cham xuc va hanh lai ((((cua tre) OR (cua triet))) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang cao hoi. hieu van cham xuc va hanh lai ((((cua tre) OR (cua triet))) or (cua te))*.