Perhaps you should try some spelling variations:
thien van » thi van
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
hau truc » cau truc, hang truc, hoc truc
tu cach » tu cac
vai cua » dai cua, hai cua, lai cua
van hau » van ha, van hai, van dau
cua tre » cua te, cuu tre, cua triet
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
vu sach » vu bach, su sach, vu khach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (vu sach)) ky ((nang ma) OR (sang ma)) hoi. thien van hau truc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (vu sach)) ky ((nang ma) OR (sang ma)) hoi. thien van hau truc van hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (vu sach)) ky ((nang ma) OR (sang ma)) hoi. thien van hau truc van hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (vu sach)) ky ((nang ma) OR (sang ma)) hoi. thien van hau truc van hanh vai cua tre*.