Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
nang tao » nang cao, sang tao, nang tai
dua tren » dung tren
tao hoi » tao khoi, tao boi, tay hoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, duc 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: thu sach ky nang tao hoi. hieu va cham ((tuc va) OR (tuc xa)) thanh hai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang tao hoi. hieu va cham ((tuc va) OR (tuc xa)) thanh hai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang tao hoi. hieu va cham ((tuc va) OR (tuc xa)) thanh hai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang tao hoi. hieu va cham ((tuc va) OR (tuc xa)) thanh hai ((dua tren) or (cua te))*.