Perhaps you should try some spelling variations:
thien quan » trien quang, lien quan, thien van
cua viet » ca viet, hoa viet, cua vat
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
lai cua » dai cua, hai cua, lai chau
dac van » cac van, dao van, dam van
cac dac » cac dan, cac dai, cac bac
sach ty » sach tu, sach thu, xach tay
nang xa » nang x, lang xa, nang ma

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) or (sach y)) nang xa hoi. ((thien quan) or (hieu qua)) cac dac van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach y)) nang xa hoi. ((thien quan) OR (hieu qua)) cac dac van hanh lai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach y)) nang xa hoi. ((thien quan) or (hieu qua)) cac dac van hanh lai cua viet*.