Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
dau hai » dai hai, dau ha, cau hai
hai cua » thai cua, dai cua, hoi cua
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
va dau » va dao
cua te » cua tu

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 ty nang xa hoi. hieu ((ve cam) or (va cam)) duc va dau hai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. hieu ((ve cam) OR (va cam)) duc va dau hai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. hieu ((ve cam) or (va cam)) duc va dau hai cua te*.