Perhaps you should try some spelling variations:
trinh han » trinh quan
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, thanh hai
tu sach » su sach, te sach, tu cach
van lam » van nam
nang xa » nang x, lang xa, nang ma
lam xuc » cam xuc, lam duoc
xuc va » duc va, tuc va, luc 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 (thu sach)) ky nang xa hoi. thien van lam xuc va ((tinh hai) OR (trinh han)) 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 va ((tinh hai) OR (trinh han)) 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 va ((tinh hai) OR (trinh han)) cac tren".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. thien van lam xuc va ((tinh hai) OR (trinh han)) cac tren*.