Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hay tinh » may tinh, ha tinh, huy tinh
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
nang tay » nang tai, nang tao, bang tay
tay hoi » tay ho, tao hoi, tay thai
ve cham » va cham, ve chat, vu cham
tinh ve » trinh ve, tinh ven, dinh ve
ve cua » le cua, de cua, te cua
ve cam » ve cac, va cam, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (hoc sach)) ky nang tay hoi. hieu ((ve cam) OR (ve cham)) xuc hay tinh ve cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang tay hoi. hieu ((ve cam) OR (ve cham)) xuc hay tinh ve cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) or (hoc sach)) ky nang tay hoi. hieu ((ve cam) OR (ve cham)) xuc hay tinh ve cua triet".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (hoc sach)) ky nang tay hoi. hieu ((ve cam) OR (ve cham)) xuc hay tinh ve cua triet*.