Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
chua tre » chua tri, cua tre, chua trieu
hanh cua » manh cua, hang cua, hanh sua
sang tao » hang tai
cam duc » cam xuc, cao duc, pham duc
hanh ca » hanh cac, hanh cat, hanh cad
su sach » so sach, vu sach
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat sach)) ky sang tao hoi. hieu ve cam duc va ((hanh ca) OR (hanh cua)) chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) ky sang tao hoi. hieu ve cam duc va ((hanh ca) OR (hanh cua)) chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat sach)) ky sang tao hoi. hieu ve cam duc va ((hanh ca) OR (hanh cua)) chua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) ky sang tao hoi. hieu ve cam duc va ((hanh ca) OR (hanh cua)) chua tre*.