Perhaps you should try some spelling variations:
dan khanh » dang khanh, van khanh, dat khanh
dan hanh » dang hanh, dan thanh, ban hanh
tu sach » thu sach, te sach, tu cach
thi van » thi lan, thi hanh, thi nang
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 (su sach)) ty nang xa hoi. thi van nam cua ((dan hanh) OR (dan khanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang xa hoi. thi van nam cua ((dan hanh) OR (dan khanh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty nang xa hoi. thi van nam cua ((dan hanh) OR (dan khanh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang xa hoi. thi van nam cua ((dan hanh) OR (dan khanh)) di cua tre*.