Perhaps you should try some spelling variations:
truc giac » thuc giai, tu giac, tuc gia
truc gia » tuc gia, thuc giai, tac gia
thanh do » thanh de, thanh pho, thanh hoa
su triet » su viet, su tien, ve triet
thu sach » thuat sach, thuoc sach, thu hoach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tu sach » su sach, te sach, tu cach
y nang » ky nang, ly nang, v nang
do su » do sut, do tu, co su

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) or (thu sach)) y nang x ho. hieu va cham ((truc gia) OR (truc giac)) thanh do su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang x ho. hieu va cham ((truc gia) OR (truc giac)) thanh do su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y nang x ho. hieu va cham ((truc gia) OR (truc giac)) thanh do su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang x ho. hieu va cham ((truc gia) OR (truc giac)) thanh do su triet*.