Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thanh dam » thanh dat, thanh nam, thanh tam
dau tieng » dau tien, cau tieng, day tieng
hanh dem » hanh kem, hanh de, hanh dieu
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va cau » van cau, va dau, va cao
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ty nang xa hoi. lieu ((va cau) or (va cac)) tuc va ((hanh dem) OR (thanh dam)) dau tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang xa hoi. lieu ((va cau) OR (va cac)) tuc va ((hanh dem) OR (thanh dam)) dau tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty nang xa hoi. lieu ((va cau) or (va cac)) tuc va ((hanh dem) OR (thanh dam)) dau tieng".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang xa hoi. lieu ((va cau) or (va cac)) tuc va ((hanh dem) OR (thanh dam)) dau tieng*.