Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat duc » chat xuc, chat doc, chet duoc
gian cua » gian xu, ban cua
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
va tinh » may tinh
via cua » gia cua, giau cua, rija cua
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) y nang x hoi. hieu van chat duc va tinh ((via cua) or (gian cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang x hoi. hieu van chat duc va tinh ((via cua) OR (gian cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) y nang x hoi. hieu van chat duc va tinh ((via cua) or (gian cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) y nang x hoi. hieu van chat duc va tinh ((via cua) or (gian cua)) te*.