Perhaps you should try some spelling variations:
thien van » thi van
cac tren » ca tren, cau tren, rac tren
thu sach » thuat sach, thuoc sach, thu hoach
tinh hai » tinh thai, tinh chat, trinh han
lam xuc » lam duoc
hai cac » khai cac, tai cac, hai cuc
va tinh » may tinh
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma

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 (thu sach)) ky nang xa hoi. thien van ((lam xuc) OR (cam xuc)) va tinh hai cac tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. thien van ((lam xuc) OR (cam xuc)) va tinh hai cac tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang xa hoi. thien van ((lam xuc) OR (cam xuc)) va tinh hai cac tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. thien van ((lam xuc) OR (cam xuc)) va tinh hai cac tren*.