Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tinh hai » tinh thai, tinh chat, trinh han
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
cam duc » cam xuc, cao duc, pham duc
va tinh » may tinh
cua cau » cua cac, cua chu, cua cay
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: te ((sach ky) OR (sach y)) nang xa hoi. hieu van cam duc va tinh hai ((cua te) or (cua cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang xa hoi. hieu van cam duc va tinh hai ((cua te) OR (cua cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) nang xa hoi. hieu van cam duc va tinh hai ((cua te) or (cua cau))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) nang xa hoi. hieu van cam duc va tinh hai ((cua te) or (cua cau))*.