Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
tu nang » tu nong, tu nano, tu lang
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
va chu » va che, va cau, va chi
chu te » chu de, chu tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((tu nang) OR (tru nang)) xa hoi. hieu vu cham duc va tinh va chu te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((tu nang) OR (tru nang)) xa hoi. hieu vu cham duc va tinh va chu te".
• Adding a wildcard symbol may retrieve word variants: su sach ((tu nang) OR (tru nang)) xa hoi. hieu vu cham duc va tinh va chu te*.