Perhaps you should try some spelling variations:
lao truoc » lam truoc, cao thuoc, nam truoc
thu sach » tu sach, thuat sach, thuoc sach
vu khach » vu khanh, vu khac, vay khach
truoc va » truc va, thuoc va, truong va
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
qua lao » cua lao, qua la, qua lau
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (vu khach)) ky lang xa hoi. hieu qua lao truoc va dinh ((di cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (vu khach)) ky lang xa hoi. hieu qua lao truoc va dinh ((di cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (vu khach)) ky lang xa hoi. hieu qua lao truoc va dinh ((di cua) or (vai cua)) tre*.