Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
nang xa » nang x, lang xa, nang ma
thi van » thi lan, thi hanh, thi nang
lam duc » lam duoc, pham duc, nam duoc
va tinh » may tinh
tinh de » tinh da, sinh de, tinh he
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
de cuu » 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: ((thu sach) OR (thuat sach)) y nang xa hoi. ((thien van) or (thi van)) lam duc va tinh de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang xa hoi. ((thien van) OR (thi van)) lam duc va tinh de cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) y nang xa hoi. ((thien van) or (thi van)) lam duc va tinh de cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) y nang xa hoi. ((thien van) or (thi van)) lam duc va tinh de cuu tre*.