Perhaps you should try some spelling variations:
nang thai » nang tai, dang thai, lang thai
su triet » su viet, su tien, ve triet
thai su » thai xu, tai su, thap su
va nang » van nang, da nang, cam nang
va cham » va chat, va tham
tu sach » thu sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
thu va » thuc va, thue va, tu va
va cam » va cac, va cao, va cai

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) or (su sach)) ty nang xa hoi. hieu ((va cam) OR (va cham)) thu va nang thai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ty nang xa hoi. hieu ((va cam) OR (va cham)) thu va nang thai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ty nang xa hoi. hieu ((va cam) OR (va cham)) thu va nang thai su triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ty nang xa hoi. hieu ((va cam) OR (va cham)) thu va nang thai su triet*.