Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
hieu van » hieu va, thien van, lieu va
hau truc » cau truc, hang truc, hoc truc
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van hau » van ha, van hai, van dau
truc va » thuc va, thuc vat, trung va
dan dai » dat dai, dan dat, dan da
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: ((su sach) or (vu khach)) ky nang xa hoi. hieu van hau truc va ((dan dai) or (can dai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) ky nang xa hoi. hieu van hau truc va ((dan dai) OR (can dai)) cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) ky nang xa hoi. hieu van hau truc va ((dan dai) or (can dai)) cua te*.