Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » dau tren, ca tren, cau treo
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
cu tren » tu tren, dua tren
tuc va » truc va, tuc xa, duc va

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 ty nang xa hoi. lieu va phat ((tuc va) OR (thuc va)) hanh vi ((cau tren) or (cu tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. lieu va phat ((tuc va) OR (thuc va)) hanh vi ((cau tren) OR (cu tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang xa hoi. lieu va phat ((tuc va) OR (thuc va)) hanh vi ((cau tren) or (cu tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. lieu va phat ((tuc va) OR (thuc va)) hanh vi ((cau tren) or (cu tren))*.