Perhaps you should try some spelling variations:
trinh van » trinh han, trinh quan, trinh toan
chua tre » chua tri, cua tre, chua trieu
tinh va » tich va, trinh vat, tinh gia
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
te sach » toc sach
ve chao » ve chat, ve cham, ve cho
xu va » xu van, tu va, su va

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 (te sach)) ky nang xa hoi. hieu ve chao xu va ((tinh va) OR (trinh van)) chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. hieu ve chao xu va ((tinh va) OR (trinh van)) chua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang xa hoi. hieu ve chao xu va ((tinh va) OR (trinh van)) chua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. hieu ve chao xu va ((tinh va) OR (trinh van)) chua tre*.