Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tang hanh » tang thanh, dang hanh, nang hanh
duc tang » duc thang, duc tan, tuc tang
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
vai cua » dai cua, hai cua, lai cua
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty nang xa hoi. hieu ((ve cam) or (ve cac)) duc tang hanh ((vi cua) or (vai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty nang xa hoi. hieu ((ve cam) OR (ve cac)) duc tang hanh ((vi cua) OR (vai cua)) viet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty nang xa hoi. hieu ((ve cam) or (ve cac)) duc tang hanh ((vi cua) or (vai cua)) viet*.