Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
xuc van » luc van, xuc ban, thuc van
duc van » duc va, duc tan, duc manh
ve cam » ve cham, ve cac, va cam
vi cau » va cau, ve cau, di cau

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. hieu ve cam ((((xuc van) or (thuc vat))) or (duc van)) hanh vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang xa hoi. hieu ve cam ((((xuc van) OR (thuc vat))) OR (duc van)) hanh vi cau tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang xa hoi. hieu ve cam ((((xuc van) or (thuc vat))) or (duc van)) hanh vi cau tren*.